Dépouillements

Antiseptic preservation studies / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 78-84 Titre : Antiseptic preservation studies Type de document : texte imprimé Auteurs : Alan E. Russell, Auteur Année de publication : 1978 Article en page(s) : p. 78-84 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Antiseptiques Concentration minimale inhibitrice (antimicrobiens) En microbiologie, la concentration minimale inhibitrice (CMI) est la plus faible concentration d'un produit chimique, généralement un médicament, qui empêche la croissance visible d'une ou de plusieurs bactéries. La CMI dépend du micro-organisme considéré, de l'être humain affecté (in vivo uniquement) et de l'antibiotique lui-même. La CMI est déterminée en préparant des solutions du produit chimique in vitro à diverses concentrations croissantes, en incubant les solutions avec des groupes séparés de bactéries en culture et en mesurant les résultats en utilisant une méthode de dilution standardisée (agar ou microdilution). Les résultats se classent ensuite comme "sensible", "intermédiaire" ou "résistant" à un antimicrobien particulier en utilisant un point d'arrêt. Les points d'arrêt sont des valeurs convenues, publiées dans les directives d'un organisme de référence, comme le US Clinical and Laboratory Standards Institute (CLSI), la British Society for Antimicrobial Chemotherapy (BSAC) ou le Comité européen sur les tests de sensibilité aux antimicrobiens (EUCAST). On a pu constater des écarts importants au niveau des points d'arrêt de divers pays européens au fil des ans, et entre ceux de l'EUCAST et du CLSI. Alors que la CMI est la concentration la plus faible d'un agent antibactérien nécessaire pour inhiber la croissance visible, la concentration bactéricide minimale (CBM) est la concentration minimale d'un agent antibactérien qui entraîne la mort bactérienne. Plus la CMI est proche de la CBM, plus le composé est bactéricide. La première étape de la découverte d'un médicament est souvent le dépistage d'un médicament candidat de banque de données pour les CMI contre les bactéries d'intérêt. En tant que tels, les CMI sont généralement le point de départ pour de plus grandes évaluations précliniques de nouveaux agents antimicrobiens. Le but de la mesure de la concentration minimale inhibitrice est de s'assurer que les antibiotiques sont choisis efficacement pour augmenter le succès du traitement. (Wikipedia) Cuirs et peaux -- Conservation Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : - Attributes of an ideal cure - Factors for evaluation in the development of novel curing methods - Classification of various preservatives - Salt curing versus antiseptic preservation - Effect of antiseptic binding to hide protein on minimum inhibiting concentrations for bacterial growth - Laboratory-screening to antiseptics - Minimum inhibiting concentrations for bacterial growth (%) - Storage trials on hide cuttings - Antiseptic storage assessments on hide cuttings - Field trials - LIRI antiseptic preservation field trial (december 1975) assessments after five-week storage En ligne : https://drive.google.com/file/d/1bqmMq1vXoR5z1VLKv69ErIWFwRS2eMYU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20426 [article]

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Hide and leather characteristics of afrikaner and friesland bulls and steers slaughtered at various ages between birth and 24 months / Alan E. Russell in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 1-10 Titre : Hide and leather characteristics of afrikaner and friesland bulls and steers slaughtered at various ages between birth and 24 months Type de document : texte imprimé Auteurs : Alan E. Russell, Auteur ; A. C. Galloway, Auteur ; R. L. Boccard, Auteur ; R. T. Naudé, Auteur Année de publication : 1978 Article en page(s) : p. 1-10 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bovins -- Races Caractérisation Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés physiques Cuirs et peaux de bovins Mesures de rendement Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Investigation of the influence of breed, sex and age factors on hide and leather characteristics indicates that when young Afrikaner and Friesland bulls and steers are reared under intensive feedlot conditions, bulls have a higher yield of green hide mass than steers and exhibit more favourable leather properties than steers, especially with regard to tensile strength in Friesland bulls. With the onset of sexual maturity in bulls after 12 months of age, accompanying changes in leather physical properties were apparent and tensile strength showed a decline particularly in Friesland bull leathers. These changes in hide physical properties appear to parallel increases in the level of natural crosslinking of the collagen molecular structure during ageing and maturation. Main differences between the two breeds studied were that Afrikaner animals were superior in terms of hide and leather yield whereas the leather of Friesland cattle was qualitatively superior. Note de contenu : - EXPERIMENTAL : Yield measurements - Leather physical tests - RESULTS : Yield measurements - Leather physical tests En ligne : https://drive.google.com/file/d/1FtMtn1fZb-Y9MSws82wym_0sEszL0Hjr/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31844 [article]

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Ultrastructural observations of skin samples obtained from various parts of animal and human body / P. L. Muthiah in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 11-16 Titre : Ultrastructural observations of skin samples obtained from various parts of animal and human body Type de document : texte imprimé Auteurs : P. L. Muthiah, Auteur ; A. S. Thambiah, Auteur ; N. Ramanathan, Auteur ; Y. Nayudamma, Auteur Année de publication : 1978 Article en page(s) : p. 11-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux de bovins Cuirs et peaux de chameaux Cuirs et peaux de chèvres Cuirs et peaux de moutons Peau -- analyse Peau humaine Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Skin samples obtained from various parts of the animal and human bodies have been investigated using the electron microscope techniques. This study shows that the structure of the entire skin of an animal is not of homogeneous nature. The variations followed a definite pattern suggesting a general classification of the various parts of the skin into flexible and non-flexible areas. From the electron microscopical observations, it may be summarised that some common features of skin samples obtained from flexible areas were as follows : presence of individual fibrils, considerable broken fibrils, increased periodicity and decreased diameter of the fibrils, sparse distribution of collagen fibrils in sections, presence of low amounts of amorphous materials, occurrence of circular structure on the surface of the skin. On the contrary non-flexible areas have the following common features : tendency in fibrils to form compact bundles, considerable amounts of intact fibril, comparatively decreased periodicity and increased diameter of the fibrils, close packing of collagen fibrils in sections, presence of large amounts of amorphous materials, and presence of figures resembling triangles and rhombuses on the surface of the skin. Note de contenu : - Human skin - Animal skin - Electron microscopy : Observation of fibrils - Observation of sections - Surface structure of the skins - Table : Variations in periodicity and diameter of collage fibrils obtained from different locations of hides and skins En ligne : https://drive.google.com/file/d/1NxTBf6BNYygCBd7VmpX3woYeJFoMZ22K/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31845 [article]

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Water sorption capacity of tanned collagen fibres / K. J. Bienkiewicz in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 34-41 Titre : Water sorption capacity of tanned collagen fibres Type de document : texte imprimé Auteurs : K. J. Bienkiewicz, Auteur ; Czeslaw Krawiecki, Auteur Année de publication : 1978 Article en page(s) : p. 34-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorption Adsorption Alumine Chrome Collagène Cuirs et peaux Eau Glutaraldéhyde Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Water sorption capacity of tanned, spun collagen fibres has been examined and compared with that of standard, tanned and acylated hide powders. Chromium, chromium-alumina, glutaraldehyde and combined tannages have been applied. In spite of that the applied tannages engage different functional groups-only small differences in water sorption capacity have been observed-these do not exceed 20% of total value. Note de contenu : - Tables : Sorption capacity of collagen fibres En ligne : https://drive.google.com/file/d/1iETJn5Ph3AIRJoChQimXKDLa3w_C25a3/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31846 [article]

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Topographic distribution of properties in softy shoe upper leathers / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 106-111 Titre : Topographic distribution of properties in softy shoe upper leathers Type de document : texte imprimé Auteurs : R. L. Boccone, Auteur ; J. Fontana, Auteur ; G. Kamp, Auteur Année de publication : 1978 Article en page(s) : p. 106-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des données Chaussures Cuirs et peaux -- Propriétés mécaniques Essais dynamiques Souplesse (mécanique) Statistique Topographie Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Topographic distribution of tensile and tear strengths, distension at grain crack and fatty matter are studied for softy upper leather. Sampling positions for each property and agreement with recommended locations are discussed. Note de contenu : - EXPERIMENTAL : Testing - Statistical analysis of data - RESULTS AND DISCUSSION : Tensile strength - Tear strength - Distension at grain crack - Fatty matters - TOPOGRAPHIC DISTRIBUTION OF PROPERTIES STUDIED : Tensile strength - Tear strength - Distension at grain crack - Substances soluble in petroleum ether - Table 1 : Averages for each location and property - Table 2 : Z intervals - Table 3 : Standard deviation of means - Table 4 : Estimates of the coefficient of correlation En ligne : https://drive.google.com/file/d/1JFWmj6dthDAkP9m7LE3cTlzhCS2nUkI4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31847 [article]

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Tannage/retannage methods for reduction of between-skin colour variation / J. R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 121-128 Titre : Tannage/retannage methods for reduction of between-skin colour variation Type de document : texte imprimé Auteurs : J. R. Barlow, Auteur Année de publication : 1978 Article en page(s) : p. 121-128 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Cuirs et peaux Retannage Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Full chrome leathers were prepared, using the same total amount of tanning agent for all samples but varying the proportions offered in the initial tannage and in the retannage (after storage). Quantitative measurements showed that those batches which received a low level of initial tannage and a substantial retannage had less colour variation than those given a fuller initial tannage and smaller retannage. The improvement was seen even after dyeing to a medium brown. Only after dark, surface dyeing were colour differences of the batches brought to a similar level. Chrome retan leathers were also made, with the chrome tanning being carried out in either one step or as a low-level initial process with a retannage to the required Cr2O3 content immediately before subsequent processing. Batches of skins from the latter method were move level than those from the one-step chrome tanning process, with the improvement still being considerable after vegetable retanning and dyeing to a medium brown. Bleaching, by the use of a proprietary Syntan, only marginally reduced the variation of colour within any pack. Note de contenu : - Instrumental measurement of colour variation and its relevance to visual assessments - Colour measurement - Fig. 1 : Mean ΔE for individual batches at different stages of processing full-chrome leathers - Fig. 2 : Mean ΔE for paired batches at different stages of processing full-chrome leathers - Fig. 3 : Percentage of skins differing from mean by more than 1.0 ANLAB unit (full-chrome leathers) - Fig. 4 : Mean ΔE at different stages of processing chrome retan leathers - Fig. 5 : Percentage of skins differing from mean by more than 1.0 units. Chrome retan leathers - Table 1 : Processing for full-chrome leathers - Table 2 : Processing of chrome retan leathers - Table 3 : Processing of chrome retan leathers - Details - Table A : Results of subjective testing - Numbers of assessors seeing difference - Table B : Statistical significance of colour assessments - Table C : Results of colour measurements of commercial leathers - Appendix 1 : Instrumental measurement of colour variation - Appendix 2 : Relationship between visual assessment and instrumental ΔE values - Appendix 3 and 4 : Results of colour measurements of commercial leathers En ligne : https://drive.google.com/file/d/1ZVrm05-hhU61Rgx4fHY2rH5i4yHL5juJ/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31848 [article]

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The determination of water content in leather by dielectric measurements / J. Raùl Grigera in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 140-142 Titre : The determination of water content in leather by dielectric measurements Type de document : texte imprimé Auteurs : J. Raùl Grigera, Auteur ; Fernando Vericat, Auteur Année de publication : 1978 Article en page(s) : p. 140-142 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène Cuirs et peaux -- Analyse Cuirs et peaux -- Teneur en eau Diélectriques Mesures diélectriques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper the determination of water content in leather is discussed using as reference the results on the dielectric properties of hydrated collagen. It is proposed that the microwave region is the only one adequat for the accurate determination of water content. Note de contenu : - Dielectric measurements - Dielectric properties of collagen - Determination of water content in leather En ligne : https://drive.google.com/file/d/1f48Q8CMqz2enu5TsIJZKIh2OQkOuwsb8/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31849 [article]

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Leather defects originating at the farm and at the abattoir / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 25-47 Titre : Leather defects originating at the farm and at the abattoir Type de document : texte imprimé Auteurs : Betty M. Haines, Auteur Année de publication : 1978 Article en page(s) : p. 25-47 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Défauts Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Most of the grain defects in leather occur during the life of animal on the farm and, indeed, the quality of the leather lies very much in the hands of the farmer, but the farmer is generally unaware of the extent of the damage or the financial losses involved. In the last year an exhibit produced by BLMRA and the Leather Institute has been shown at agricultural shows with the aim of showing the farmer how the damage may be minimised. On the same subject, a paper has been given to the Dermatology Group of the British Veterinary Association and also to the Association of Meat Inspectors. During the preparation of this paper a selection was made from the large collection of photographs of skin diseases made by BLMRA over the years. As is it the first time these photographs have been collected together in this form, this paper is presented here for the interest of tanners. Note de contenu : - DAMAGE BY PARASITES - GENETIC DEFECT : Vertical fibre - Ribbiness in sheepskins - MECHANICAL DAMAGE TO THE SKIN : Barbed wire - Freeze branding - Injection - DAMAGE AT THE ABBATOIR En ligne : https://drive.google.com/file/d/1oE3ftt8_T3iYWXxet23Sg2ouBNfc6m3A/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31874 [article]

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Distribution of mechanical properties in wool-on sheepskins / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 128-131 Titre : Distribution of mechanical properties in wool-on sheepskins Type de document : texte imprimé Auteurs : R. L. Boccone, Auteur ; J. Fontana, Auteur ; G. Kamp, Auteur Année de publication : 1978 Article en page(s) : p. 128-131 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des données Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux de moutons Essais dynamiques Résistance à la déchirure Résistance à la traction Statistique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Distribution of basic mechanical properties-tensile and tear strengths-is studied for garment wool-on sheepskins. Data obtained was used to verify the agreement of sampling locations calculated for these leathers with those currently recommended in sampling procedures. Note de contenu : - EXPERIMENTAL : Testing locations - Testing - Stastical analysis of data - RESULTS AND DISCUSSION : Tensile strength - Tear strengh - TOPOGRAPHIC DISTRIBUTION OF PROPERTIES STUDIED : Tensile strength - Tear strength - Table 1 : Average for each location and property - Table 2 : Standard deviation of means - Table 3 : Z-intervals - Table 4 : Estimates of the coefficient of correlation En ligne : https://drive.google.com/file/d/1ybSS1PcTzIprhXA9YxfQztQrhHz0BsD5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31875 [article]

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Procter memorial lecture collager, 1891-1977 : retrospect and prospect / Alan Gordon Ward in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 1-13 Titre : Procter memorial lecture collager, 1891-1977 : retrospect and prospect Type de document : texte imprimé Auteurs : Alan Gordon Ward, Auteur Année de publication : 1978 Article en page(s) : p. 1-13 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Collagène Cuirs et peaux Index. décimale : 675 Technologie du cuir et de la fourrure Note de contenu : - 1895-1925. The origins of collagen research - 1925-1955. Laying the foundation - 1955-1977. The edifice takes shape - Table 1 : Amino acid composition of collagen - Table 2 : Molecular data for the citrate (pH 4.3) soluble carp swim bladder collagen by various methods - Table 3 : Collagen types En ligne : https://drive.google.com/file/d/1yE8wCpPBN-DIkRrB54MfnIZjjmTgOcs4/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35211 [article]

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Some properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 29-33 Titre : Some properties of wet-blue leathers produced from recycled chrome tanning liquors Type de document : texte imprimé Auteurs : John R. Barlow, Auteur ; H. S. W. Ip, Auteur Année de publication : 1978 Article en page(s) : p. 29-33 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome -- Recyclage Liqueurs de tannage Résistance à la déchirure Résistance à la traction Température de retrait Wet-blue (tannage) Peau tannée au chrome (le chrome donne une couleur bleue) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A simple recycling system was used in the preparation of wet-blue leathers, with the residual chrome tanning liquor being replenished with acid and salt before being used for pickling the next batch of bated hide. Chrome tanning powder was added to the liquor on completion of pickling, to give a total offer of the required amount, with the wet blues thus produced being compared to those prepared by a conventional process. Two series of experiments were carried out to give either "low chrome" (1.8 % Cr203, dry weight basis) or "normal chrome" (2.5 % Cr203) wet blues. Within each series, the initial properties and storage behaviour were unaffected by the use of recycled, rather than fresh, chrome tanning liquors. Low chrome and normal chrome samples displayed similar stability under the storage conditions used, with neither set showing deterioration of the measured properties after the prescribed holding time. Colour measurements on the wet-blues before and after storage showed that the leathers from recycled liquors did not undergo changes greater than those of the control samples, and that between-batch colour differences should not be a problem in practical application. Wastage of chrome tanning salt, and hence concentration of chrome in the effluent, was reduced by approximately 90 % by recycling the residual tanning liquor, rather than discarding it as in a normal process. Overall consumption of chrome tanning salt was reduced by 13 % (low chrome series) and by 24 % (normal chrome series) compared to that of similar, conventional processes. Note de contenu : - METHODS : Starting material - TESTING OF WET-BLUES : Shrinkage temperature - Tensile strength and tear strength - Colour - RESULTS : Effects of recycling on Initial Properties of wet-blues and on chemical consumption during processing - Change properties of wet-blues during storage En ligne : https://drive.google.com/file/d/1IQRJ-9WYI38akuFUe8kWH_9V0PgrIyuE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35212 [article]

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A syringe filtration method for tannin analysis using glass fibre filter pads / D. C. F. Garbutt in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 61-62 Titre : A syringe filtration method for tannin analysis using glass fibre filter pads Type de document : texte imprimé Auteurs : D. C. F. Garbutt, Auteur ; R. A. Jones, Auteur Année de publication : 1978 Article en page(s) : p. 61-62 Langues : Anglais (eng) Catégories : Fibres de verre Filtration Seringues Tanins -- analyse Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : A method for the filtration of tannin analytical solutions is presented. Agreement with results using the standard filter candle method is within acceptable limits. Note de contenu : - Table 1 : Statistical analysis of residue weights from candle filtration and syringe filtration - Table 2 : Mean values of colour determinations on candle filtered ans syringe filtered solutions En ligne : https://drive.google.com/file/d/1dnje8bBN-XaEtffcKsh5CcbhDwRq4p5S/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35213 [article]

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More security in leather dyeing by observing build-up power and affinity numbers / L. Rooryck in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 85-87 Titre : More security in leather dyeing by observing build-up power and affinity numbers Type de document : texte imprimé Auteurs : L. Rooryck, Auteur Année de publication : 1978 Article en page(s) : p. 85-87 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Cuirs et peaux -- Teinture Essais (technologie) Evaluation Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In most works, selection of dyes for the dyeing of leather is based on long years of practical experience. Yet accelerating changes in fashion which involve changes in processing methods, particularly regarding retanning, fatliquoring, etc., as well as changes in countries of origin of skins, result in a change of behaviour of these leathers during dyeing. Frequently operational considerations prevent changes in substrate and in method of dyeing. Dyeing results can, however, be substantially improved by an optimum dye selection in accordance with recently established criteria. The dyeing behaviour of any dye on leather is influenced by many factors. In is difficult to create conditions that are exactly reproducible. Under the name of "Dermagen testing method" a process has been developed which is characterised by the mass-dyeing of a leather pulp made of shavings of a standard-tanned leather. Depending on the standard depth figures are established for build-up power, the saturation limit as well as the affinity of a dye. On the basis of the numbers of affinity and the build-up power dues can be won about the behaviour of dye or combinations of dyes on leathers of varying pretreatment. Thus the selection of dyes on the basis of their dyeing behaviour is greatly simplified. Note de contenu : - The dermagen testing method - Principle of the dermagen testing method - Example of a pure-chrome leather pulp (high-affinity) - Example of a low-affinity mass - Standard depths - Examples - Build-up power and saturation limit - Assessment of build-up power and saturation limit of leather dyes - Significance of build-up of power and saturation limit - Behaviour concerning affinity - Assessment of the affinity numbers of leather dyes - Test procedure - Examples - Significance of affinity numbers En ligne : https://drive.google.com/file/d/1f8-X88YphMzCG9vXV19zlEV5Pf64spfh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35214 [article]

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Oxazolidines - A new class of tanning agents / Samir Dasgupta in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 97-105 Titre : Oxazolidines - A new class of tanning agents Type de document : texte imprimé Auteurs : Samir Dasgupta, Auteur Année de publication : 1978 Article en page(s) : p. 97-105 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agents de tannage Chaleur humide Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuir -- Teneur en chrome trivalent Cuirs et peaux -- Analyse Cuirs et peaux de moutons Oxazolidine Résistance à la déchirure Résistance à la traction Tannage au chrome Tannage combiné Le tannage combiné se dit des tannages qui allient deux familles ou genre de tannage pour obtenir un résultat additionnant les qualités complémentaires des tannins mis en Å“uvre par exemple Chrome-Végétal ou Chrome-Synthétique Tannage végétal Transpiration Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Oxazolidines are heterocyclic derivatives obtained by the reaction of aminohydroxy compounds with aldehydes. The bifunctional behaviour of these oxazolidines is responsible for their cross-linking reactions with phenols and proteins. Two typical oxazolidines, namely 4,4-Dimethyl-1,3-oxazolidine and 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane have been studied extensively for their use as tanning agents and it has been found that both these oxazolidines react with hide protein and impart special characteristics to leather when tanned in conjunction with syntan, chrome or vegetable tanning materials. 4,4-Dimethyl-1,3-oxazolidine has been found especially suitable for pretanning of greasy pickled sheepskins, subsequently to be degreased with aqueous degreasing systems. Pickled sheepskin even at 3-5 % level of application gives shrinkage temperatures around 70-75°C within an hour of treatment and unlike glutaraldehyde, the pretanned leather remains natural white and so may be finally tanned with syntan or zirconium for white leather. 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane on the other hand has been found suitable for chrome or vegetable combination tannages of all kinds of leather, especially wool skin tannages where the wool remains spotless white even if the pH of the exhaust chrome liquor moves up to 4.5. Vegetable tanned leather pre-treated with 1-Aza-3,7-dioxabicyclo-5-ethyl (3,3,0) Octane gives higher degree of tannage, higher shrinkage temperature and about 50 % lower water solubles than conventional tannage. Normal vegetable tanned leather when retanned with about 10 % of 1-Aza-3,7-dioxa-bicyclo-5-ethyl (3,3,0) Octane for an hour gives a shrinkage temperature around 100°c. Fuither, it has been found that the use of oxazolidine affords better utilisation of chrome when used in chrome tanning. The reduced chrome content in the exhaust liquors helps in pollution control. Note de contenu : - EXPERIMENTAL : Effect of initial pH and time - Effect of concentration - Tannage in combination with chrome - Tannage in combination with vegetable tanning materials - Comparison with glutaraldehyde-chrome combination tannages. Oxazoliding I vs. glutaraldehyde on pretannages of skins - Oxazolidine II vs. Glutaraldehyde on chrome tanning of sheepskins - Oxazolidine II vs. glutaraldehyde on vegetable tannage of sheepskins - Table 1 : Typical properties of oxazolidines - Table 2 : Chrome content of finished leather - Table 3 : Tear strength of finished leather - Table 4 : Tensile strength of finished leather - Table 5 : Effect of moist heat on leather - Table 6 : Effect of perspiration solution on leather - Table 7 : Tensile strength of vegetable tanned crust leather - Table 8 : Tear strength of vegetable tanned crust leather - Table 9 : Chemical analysis of vegetable tanned crust leather - Table 10 : Effect of moist heat on vegetable leather - Table 11 : Effect of perspiration solution on vegetable tanned leather En ligne : https://drive.google.com/file/d/1G6mpUYSZp3ekgWrtLRMORyPSpD2O_avE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35215 [article]

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Relationship between physical and chemical characteristics of vegetable tanned sole leathers of indian origin / G. Gangi Reddy in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 132-139 Titre : Relationship between physical and chemical characteristics of vegetable tanned sole leathers of indian origin Type de document : texte imprimé Auteurs : G. Gangi Reddy, Auteur ; M. P. Samy, Auteur ; S. Bangaruswamy, Auteur ; J. B. Rao, Auteur ; M. Santappa, Auteur Année de publication : 1978 Article en page(s) : p. 132-139 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés chimiques Cuirs et peaux -- Propriétés physiques Cuirs et peaux de buffles Semelles Tannage végétal Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The relationship between some of the chemical characteristics and important physical characteristics of vegetable tanned Indian buffalo hides is studied. Samples from both the butt and back regions are taken up for the studies to arrive at definite conclusions. Systematic analysis of the data obtained are carried out and then correlations are illustrated through graphs. Note de contenu : - Table 1 : Butt - Correlation between chemical and physical characteristics - Table 2 : Correlation between chemical and physical characteristics En ligne : https://drive.google.com/file/d/1Gd78Q_xz_gPLNBUiiorqQ6aZdWVYW6wY/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35216 [article]

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UV curing polymers in leather finishing / M. A. Knight in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 14-17 Titre : UV curing polymers in leather finishing Type de document : texte imprimé Auteurs : M. A. Knight, Auteur ; A.-G. Marriott, Auteur Année de publication : 1978 Article en page(s) : p. 14-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Finition Formulation (Génie chimique) Laque et laquage Photoréticulation Polyacétals Polyesters Revêtements -- Séchage sous rayonnement ultraviolet solvants Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This preliminary study has shown that clear lacquer finishes can be produced on leather by the use of UV curing systems whereby reactive solvent becomes part of the finish. Already performance levels are comparable to those found on many commercial solvent based systems. There is every likelihood that these levels will be increased. Chemical costs are likely to be substantially less than with conventional spray finishing of solvent diluted lacquers. Savings on chemicals are greater than the increased capital investment necessary for the roller-coating equipment which we believe is an essential pre-requisite for the industrial application of UV-curing finishes by the leather industry. Note de contenu : - Introduction and economic justification - Experimental : Prepolymer type - Monomer diluent - Photo-initiator content - Table 1 : Range of actual values recorded for individual formulations - Table 2 : Performance characteristics of a formulation based on a urethane acrylate oligomer and a high molecular weight acrylic monomer En ligne : https://drive.google.com/file/d/16miyFQ6vZhMslzG-BD1-Zb5dVD0BgnOu/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35218 [article]

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Leather defects originating at the farm and at the abattoir / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 25-45 Titre : Leather defects originating at the farm and at the abattoir Type de document : texte imprimé Auteurs : Betty M. Haines, Auteur Année de publication : 1978 Article en page(s) : p. 25-45 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Défauts Cuirs et peaux -- Défauts -- Classification Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Most of the grain defects in leather occur during the life of the animal on the farm and, indeed, the quality of the leather lies very much in the hands of the farmer, but the farmer is generally unaware of the extent of the damage or the financial losses involved. In the last year an exhibit produced by BLMRA and the Leather Institute has been shown at agricultural shows with the aim of showing the farmer how the damage may be minimised. On the same subject, a paper has been given to the Dermatology Group of the British Veterinary Association and also to the Association of Meat Inspectors. During the preparation of this paper a selection was made from the large collection of photographs of skin diseases made by BLMRA over the years. As it is the first time these photographs have been collected together in this form, this paper is presented here for the interest of tanners. The aesthetic quality of leather depends to a very great extent on the fine smooth outer or grain surface, which is exposed once the tanner removes the epidermis and hairs by means of chemicals during the early stages of processing. Character is given to this surface by the mouths of the hair follicles, which are grouped in patterns that are distinctive according to the animal type from which the skin was taken. For example, Fig. 1 shows the grain surface of leather prepared from cattle hide and here the follicle mouths are all equal in size and arranged in rows. Figure 2 shows the grain surface of leather produced from fine woolled sheep, such as Merino: here the numerous wool follicles are arranged in groups. This outer surface of the leather is frequently marred by damage to the skin during the life of the animal, damage caused by parasites, abrasion, dung and the injections and brands applied by the farmer. In the United Kingdom the main bulk of leather is produced from skins of cattle and sheep, so the defects in this paper are restricted to these two animal types. Note de contenu : - Damage by parasites - Genetic defect - Vertical fibre - Ribbiness in sheepskins - Mechanical damage to the skin - Barbed wire - Freeze branding - Injection - Damage at the abattoir En ligne : https://drive.google.com/file/d/1oE3ftt8_T3iYWXxet23Sg2ouBNfc6m3A/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35219 [article]

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Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 / H. A. Birkin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 55-62 Titre : Redevelopment of medieval leathers for the curragh "Brendan's" transatlantic voyage 1976-77 Type de document : texte imprimé Auteurs : H. A. Birkin, Auteur ; P. Elliott, Auteur ; C. Postles, Auteur ; A.-G. Marriott, Auteur ; R. L. Sykes, Auteur Année de publication : 1978 Article en page(s) : p. 55-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Archéologie Bateaux -- Conception et construction Coques (architecture navale) Croûte (cuir) On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés. Cuirs et peaux -- Effets de la température Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés physiques Cuirs et peaux de bovins Essais de résilience Evaluation Immersion Matériaux -- Imprégnation Résistance à l'eau salée Résistance à l'humidité:Résistance à l'eau Résistance à la traction Tanins végétaux Technologie -- Moyen âge Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The paper is a descriptive account of work undertaken to re-create medieval leathers for use in an exercise in experimental archaeology—namely the Brendan voyage 1976-77. Leather for the boat's hull was made from oak-tanned ox hide impregnated with wool grease; it contained 35% dichloromethane extractables (IUC/4), had a water absorbtion (IUP/7) of 14% after 72 h, and resisted penetration by 3.5 % saline for more than 2000 h (IUP/1 1). The wooden frame was lashed together with alum tanned laces, which had a wet-breaking load of 45 kg. The transatlantic voyage of 4500 miles was completed in two stages and took 111 days (85 days at open sea), the hull leather retained its structural stability and initial water resistance. Note de contenu : - Developmment of the hull leather : Materials - Test programme - Results - Verification of performance - Table 1 : Performance of various dressed industrial leathers - Table 2 : Effects of different impregnants on the dimensional stability and water resistance of various crust leathers - Table 3 : Effect of drying sammed leagther under 10% linear extension on physical properties - Table 4 : Range of test data obtained froom leathers used construction of the hull - Table 5 : Performance of lace leathers - Table 6 : Evaluation of hull leather which had endured the transatlantic crossing - Fig. 1 : Projected route of Brendan voyage - Fig. 2 : Schematic diagram of Brendan - Fig. 3 : Effect of immersion time and temperature on apparent uptake of wool grease during static immersion. Dashed line shows fall in tensile strength with extended impregnation at 50°C - Fig. 4 : Partly constructed hull, leather laces holding the frame are in the foreground ; a line of handstitching on the hull leather can be seen top left - Fig. 5 : Brendan and crew shortly after launching En ligne : https://drive.google.com/file/d/1cgOTZjDf-45dcfFZvNyucyKSUuwzOvNo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35220 [article]

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The biodegradability of tannery chemicals / D. R. Corning in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 63-67 Titre : The biodegradability of tannery chemicals Type de document : texte imprimé Auteurs : D. R. Corning, Auteur Année de publication : 1978 Article en page(s) : p. 63-67 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chimie analytique Produits chimiques -- Biodégradation Tannage Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Public sewage treatment authorities are often bath to accept tannery effluents because they are apprehensive either about the effects of specific components, e.g. heavy metals and sulphides on their processes, or of the high COD to BOD ratios which have been cited as indicating non-biodegradability. Real resistance to treatability is even more relevant to onsite biological treatment by the tannery. The work described below was undertaken to investigate both of these aspects. Laboratory trials were carried out, using various techniques, to examine the inherent treatability of a number of tanning materials, dyestuffs and other chemicals widely used in tannery processes. Later, one of the techniques was employed in a study of the treatment of a mixed effluent, the work subsequently being extended to pilot plant operation in a tannery. Note de contenu : - EXPERIMENTAL TECHNIQUES : Laboratory scale activated sludge plants (ASP) - Respirometry - FINDINGS : Tanning agents - Biocides - Dyestuffs - Fig. 1 : Laboratory ASP - Fig. 2 : Respirometer cell - Fig. 3 : Respirometer trials, typical growth curve - Fig. 4 : COD changes, tan/sewage mixture in ASP - Fig. 5 : BOD changes, tan/sewage mixtures in ASP - Fig. 6 : Laboratory ASP trials, treatment of sewage/tannery effluent mixtures - Fig. 6a : Effect of phosphate addition on removal efficiency - Fig. 7 : Pilot scale ASP : general arrangement - Table 1 : Respirometer trials, replacing standard nutrients with tans to maintain constant initial COD levels - Table 2 : Addition of biocides to "standard" respirometer eco-systems - Table 3 : Reduction of oxygen demands in ASP dyes (0.01 %) in domestic sewage En ligne : https://drive.google.com/file/d/15D7ZWgPlD6TJTlQc5pojaSGtrXirn8eh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35221 [article]

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The effect of particle size on the characteristics and performance of emulsion binders and topcoats / T. J. Braithwaite in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 82-86 Titre : The effect of particle size on the characteristics and performance of emulsion binders and topcoats Type de document : texte imprimé Auteurs : T. J. Braithwaite, Auteur Année de publication : 1978 Article en page(s) : p. 82-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colloides Cuirs et peaux -- Finition Emulsification Emulsions Emulsions -- Stabilité Laque et laquage Liants Polymères en émulsion Polyuréthanes Taille des particules Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The term emulsion, as applied to coating binders as is known today, is, in fact, a misnomer since by definition an emulsion is a mixture of two or more immiscible liquids, and binders are a mixture of an immiscible solid and a liquid. The correct terminology should thus be a resin dispersion but, for the sake of convenience, will always be referred to as "emulsion". Aqueous polymers exist as three specific types. These types vary very significantly in both physical and mechani-cal properties. These three types are aqueous dispersions or emulsions, colloidal dispersions and true solutions. Aqueous dispersions, or emulsions as they are commonly known, can be defined as discrete particles of high molecular weight polymer dispersed in an aqueous medium. The solid polymer is known as the disperse phase, while the water is the disperse medium. Colloidal dispersions can be considered to be ultra-fine particles or molecular weight intermediates between that of aqueous dispersions and true solutions. The polymers contain polar groups, either acidic or basic, which do impart some degree of solubility. The colloidal dispersions can also be considered as hybrids of dispersions and true solutions, in that they possess properties which are common and characteristic of both types. True solutions, or water reducible resins, are polymers in which polymerisation reactions are performed in water miscible organic solvents such as esters and alcohols, or solubilised by the addition of alkali, i.e. neutralisation. Solubility is also attributed to polar groups on the polymer side chains. The polymers are thus totally soluble in the medium water. The above generalisation will thus suffice to explain the varions "states" in which aqueous polymers are available. Emulsions find application in the function as binders or topcoats for leather finishing, while colloidal dispersions are used to a smaller extent as thickeners for the finish mixes and more commonly, as pasting adhesives. Water reducible urethane lacquers are also the colloidal dispersions type. True solutions are not currently used in leather finishing but are in the paint industry, particularly the automotive and appliance industries. Note de contenu : - TYPES OF EMULSIONS - SURFACE ACTIVE AGENTS - THE EMULSIFICATION PROCESS - MEASUREMENT OF PARTICLE SIZE DISTRIBUTION : Measurement of particle size distribution : The electron microscope - Sedimentation method - Soap titration method - Light scattering method - General remarks - THE EFFECT OF PARTICLE SIZE ON THE NATURE OF THE EMULSION, EMULSION POLYMERS AND BINDERS : Emulsion stability - Viscosity - Solids - Nitrocellulose lacquer emulsions - THE EFFECT OF PARTICLE SIZE ON THE EFFECT OF PARTICLE SIZE ON THE PERFORMANCE OF THE EMULSION-BASED FINISHING SYSTEMS : Properties improved by increasing particle size - Disadvantages of fine particle emulsions En ligne : https://drive.google.com/file/d/1EKuMbEz4pgpYU_3wKzkdO2M4Th7KcxAl/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35222 [article]

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The probable cause of the multiple linear scratch defect of cattle hides in Ireland / H. P. Baker in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 103-107 Titre : The probable cause of the multiple linear scratch defect of cattle hides in Ireland Type de document : texte imprimé Auteurs : H. P. Baker, Auteur ; H. Oormadzi, Auteur Année de publication : 1978 Article en page(s) : p. 103-107 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Défauts Cuirs et peaux de bovins Rayures Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In the Republic of Ireland the gross annual output of undressed hides and skins and manufactured leather goods exceeded £16 million in 1976. Whilst the hides of some countries command high prices because of their consistent good grading and consequent suitability for the manufacture of high priced goods, local hides are often down-graded because of defects of the grain or upper surface. Damage may occur ante-mortem. Post-mortem damage may occur at the time of flaying, as a result of poor storage or when processed. Tancous et al. (1959) considered that stable flies, horn flies and sucking flies caused leather damage but produced no experimental evidence, however Everett et al. (1977) provide evidence that in the United States the prime cause of damage was bard ticks, with Demodex bovis (the hair follicle mite) also being important. In a preliminary survey conducted in the Republic of Ireland, Baker (1973) showed the most common defect to be that of multiple scratches with consequent down-grading. He considered the cause to be ectoparasites. To substantiate the hypothesis that the multiple scratch defect results from ectoparasitism the following survey and experiments were undertaken. Note de contenu : - Table 1 : Survey of irish hides - Fig. 1 : Right side of tanned hide, only a few of the multiple scratches have been indicated by poster paint to display their distribution ; no tick bites or democex pustules were present - Fig. 2 : The scratch defect - Fig. 3 : Healed scratch - Fig. 4 : Post-mortem scratch made at chrome level stage - Fig. 5 : Close-up of cervical regions of experimentally infested animal - Fig. 6 : Close up oc cervical region of uninfested control animal - Fig. 7 : Scratch marks on steer A made eight days and five days prior to slaughter - Fig. 8 : Scratch marks on tanned leather of steer A - Fig. 9 : Tick bite marks on tanned leather, the coin is 1-75 cm in diameter En ligne : https://drive.google.com/file/d/1rcZvhmfBGTtkE-SxBu4n76rmlQ-z33U1/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35223 [article]

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The rapid fellmongering of New Zealand skins / Mary Dempsey in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 108-113 Titre : The rapid fellmongering of New Zealand skins Type de document : texte imprimé Auteurs : Mary Dempsey, Auteur ; J. Haarer, Auteur ; I. R. Hughes, Auteur ; G. W. Vivian, Auteur Année de publication : 1978 Article en page(s) : p. 108-113 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chaulage Délainage Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In experiments on rapid processing of pelts with paints made of sodium sulphide and caustic soda thickened with lime, good pull was achieved after 2 h with a paint at 2000 mgEq NaOH/1 containing not less than 6° Bé sodium sulphide (4 % Na2S). The temperature in pile was controlled by the temperature of the pelt at painting. Raising the temperature in pile (18° was compared to 22°c) favoured wool loosening but unduly loosened the "scud" (epidermal residue left over the pelt) especially if the paint contained a high amount of caustic soda. After a 2 h wool pull and liming at cool temperatures (16° was compared with 26°c falling to 23° overnight) the pelt was more mottled than the normal current production. Liming at 32°c and pH 12.5 reduced mottle to a level satisfactory for nappa leathei and gave fuller feeling leather, but one of three cooperating tanners found some dull grain in leather from 2 h pull and warm liming. Liming at 32°c may be dangerously warm for works conditions: temperature not higher than 28 ° is recommended. The relation between the blood vessels in the skin and plumping on the one hand and, on the other, increased temperature and opening up of the fibre structure explains the development of mottle and its avoidance by warm liming. Note de contenu : - Preliminary tests - Experiment I - Experiment II - Results : Works reports - Laboratory report - Experiment III - Table 1 : The effect of alkalinity - Table 2 : Pulling (Experiment I) - Table 3 : The lime liquors (Experiment I) - Table 4 : Analyses of paint (experiment II) (mgEq NaOH/I) - Table 5 : Assessment of sample plets (experiment II) - Fig. 1 : Blood vessels and mottle. The collagen fibres are closely woven round the blood vessel and less compactly interwoven elsewhere. The diagram roughly indicates the flow of the fibres in the weave pattern of the pelt - Fig. 2 : Milk lamb pelt of normal production. The section has not quite gone along the blood vessel and the hatching in the diagram indicates its consequently vaguely pictured path through the pelt in the photomicrograph. Some wool roots (WR) and fat globules (F) are also indicated - Fig. 3 : Milk lamb of Quikpul production. The section went through some length of the blond vessel shown in the micrograph. Its direction through the pelt is indicated by arrows. The fibre structure is considerably opened up. The wall of the vessel appears relaxed En ligne : https://drive.google.com/file/d/19saAvF3xOGKIRdhICh8Bj6ioEpyBNrQg/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35224 [article]

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008597	-	Périodique	Archives	Documentaires	Exclu du prêt

Distribution of mechanical properties in wool-on sheepskins / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61 et 62 (Années 1977 et 1978) . - p. 128-131 Titre : Distribution of mechanical properties in wool-on sheepskins Type de document : texte imprimé Auteurs : R. L. Boccone, Auteur ; J. Fontana, Auteur ; G. Kamp, Auteur Année de publication : 1978 Article en page(s) : p. 128-131 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés mécaniques Peau de laine de mouton Résistance à la déchirure Résistance à la traction Statistique Vêtements en cuir Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Distribution of basic mechanical properties-tensile and tear strengths-is studied for garment wool-on sheepskins. Data obtained was used to verify the agreement of sampling locations calculated for these leathers with those currently recommended in sampling procedures. Note de contenu : - EXPERIMENTAL : Testing locations - Testing - Statistical analysis of data - RESULTS AND DISCUSSISON : Tensile strength - Tear strength - TOPOGRAPHIC DISTRIBUTION OF PROPERTIES STUDIED : Tensile strength - Tear strength - Table 1 : Average for each location and property - Table 2 : Standard deviation of means - Table 3 : Z-intervals - Table 4 : Estimates of the coefficient of correlation En ligne : https://drive.google.com/file/d/1ybSS1PcTzIprhXA9YxfQztQrhHz0BsD5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35225 [article]

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