Accueil
JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) / Union internationale des sociétés de techniciens et chimistes des industries du cuir . Vol. 61, N° 6Mention de date : 11-12/1977Paru le : 01/11/1977 |
Dépouillements
Ajouter le résultat dans votre panierTannage/retannage methods for reduction of between-skin colour variation / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 6 (11-12/1977)
[article]
Titre : Tannage/retannage methods for reduction of between-skin colour variation Type de document : texte imprimé Auteurs : John R. Barlow, Auteur Année de publication : 1977 Article en page(s) : p. 121-128 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie
Cuirs et peaux
Retannage
Tannage au chromeIndex. 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 leathersEn ligne : https://drive.google.com/file/d/1ZVrm05-hhU61Rgx4fHY2rH5i4yHL5juJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34122
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 6 (11-12/1977) . - p. 121-128[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 007115 - Périodique Bibliothèque principale Documentaires Disponible 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, N° 6 (11-12/1977)
[article]
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 : 1977 Article en page(s) : 132-139 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Cuirs et peaux de bovins
Cuirs et peaux de buffles
Humidité -- Absorption:Eau -- Absorption
Résistance à la déchirure
Résistance à la traction
Tannage végétalIndex. 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 : - Oils and fats—Tensile strength and tearing strength
- Water solubles—Tensile Strength and tearing strength
- Water solubles-water absorption
- Fixed tannins-tensile strength and tearing strength
- Fixed tannins—Water Absorption
- Leather substances—Tensile strength and tearing strength
- Leather substance—Water absorption
- Degree of tannage—Tensile strength and tearing strength
- Degree of tannage—Water absorption
- Table 1 : Butt-correlation between chemical and physical characteristics
- Table 2 : Back-correlation between chemical and physical characteristicsEn ligne : https://drive.google.com/file/d/1Gd78Q_xz_gPLNBUiiorqQ6aZdWVYW6wY/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34123
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 6 (11-12/1977) . - 132-139[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 007115 - Périodique Bibliothèque principale Documentaires Disponible 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, N° 6 (11-12/1977)
[article]
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 : 1977 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 diélectriquesIndex. 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 leatherEn ligne : https://drive.google.com/file/d/1f48Q8CMqz2enu5TsIJZKIh2OQkOuwsb8/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34124
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 6 (11-12/1977) . - p. 140-142[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 007115 - Périodique Bibliothèque principale Documentaires Disponible Topographic distribution of properties in softy shoe upper leathers / R. L. Boccone in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 6 (11-12/1977)
[article]
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 : 1977 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
TopographieIndex. 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 correlationEn ligne : https://drive.google.com/file/d/1VGCMz5wCLAE_ybICuos40AILmet74H78/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40484
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 61, N° 6 (11-12/1977) . - p. 106-111[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 007115 - Périodique Bibliothèque principale Documentaires Disponible
Exemplaires (1)
Code-barres | Cote | Support | Localisation | Section | Disponibilité |
---|---|---|---|---|---|
007115 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |