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Comparison of leather produced from fresh and salted hides / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59 (Année 1975)
[article]
Titre : Comparison of leather produced from fresh and salted hides Type de document : texte imprimé Auteurs : Betty M. Haines, Auteur Année de publication : 1975 Article en page(s) : p. 161-171 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir
Echantillonnage
Etudes comparatives
Mesure
Peaux brutes
Rendement en surfaceTags : 'Peaux fraiches' salées' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The introduction of stringent effluent regulations is encouraging a change from traditional curing methods to the processing of fresh hides. The question then arises as to the quality of the leather and the area yield obtainable from fresh hides compared with salted. This comparison was made in three separate trials using 100 fresh and 100 wet salted hides in each trial. Data such as weight, thickness and area of the raw hides was recorded. A proportion of the hides were examined at stages through the processing, and the final leathers were subjected to physical tests.
Apart from a slightly coarser break in the leathers produced from the fresh hides, no consistent differences in handle or physical properties relating to the curing methods could be found in the leathers.
When the yield of leather was estimated on a weight basis either tail or green fleshed weight, no statistically significant difference in yield was found between the two curing methods.
As the raw hides of the same weight differed considerably in area and thickness, a more precise basis for calculation of yield is one based on area. This was calculated for 50 hides in each of the three packs. Overall no statistically significant difference in yield was found relating to the curing methods.
From this work we have concluded that there is no consistent difference between fresh and salted hides with regard to the yield and quality of leather produced from them.Note de contenu : - EXPERIMENTAL PLAN : Processing - Measurements made - Sampling for laboratory investigation
- RESULTS : Variation in the raw material - Area yield - Leather quality
- DISCUSSION : Variations in raw material - Area yield - Processing - Leather quality - Microscopical observationsEn ligne : https://drive.google.com/file/d/1NvhT8uz8VDV5OLNZO5mF4cpG2UU4iGPL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31838
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 59 (Année 1975) . - p. 161-171[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008595 - Périodique Archives Documentaires Exclu du prêt Comparison of leather produced from fresh and salted hides / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 59, N° 6 (11-12/1975)
[article]
Titre : Comparison of leather produced from fresh and salted hides Type de document : texte imprimé Auteurs : Betty M. Haines, Auteur Année de publication : 1975 Article en page(s) : p. 161-171 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuir
Echantillonnage
Etudes comparatives
Mesure
Peaux brutes
Rendement en surfaceIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The introduction of stringent effluent regulations is encouraging a change from traditional curing methods to the processing of fresh hides. The question then arises as to the quality of the leather and the area yield obtainable from fresh hides compared with salted. This comparison was made in three separate trials using 100 fresh and 100 wet salted hides in each trial. Data such as weight, thickness and area of the raw hides was recorded. A proportion of the hides were examined at stages through the processing, and the final leathers were subjected to physical tests.
Apart from a slightly coarser break in the leathers produced from the fresh hides, no consistent differences in handle or physical properties relating to the curing methods could be found in the leathers.
When the yield of leather was estimated on a weight basis either tail or green fleshed weight, no statistically significant difference in yield was found between the two curing methods.
As the raw hides of the same weight differed considerably in area and thickness, a more precise basis for calculation of yield is one based on area. This was calculated for 50 hides in each of the three packs. Overall no statistically significant difference in yield was found relating to the curing methods.
From this work we have concluded that there is no consistent difference between fresh and salted hides with regard to the yield and quality of leather produced from them.Note de contenu : - EXPERIMENTAL PLAN : Processing - Measurements made - Sampling for laboratory investigation
- RESULTS : Variation in the raw material - Area yield - Leather quality
- DISCUSSION : Variations in raw material - Area yield - Processing - Leather quality - Microscopical observationsEn ligne : https://drive.google.com/file/d/1NvhT8uz8VDV5OLNZO5mF4cpG2UU4iGPL/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31862
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 59, N° 6 (11-12/1975) . - p. 161-171[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007104 - Périodique Bibliothèque principale Documentaires Disponible Fiber structure and the physical properties of leather / Betty M. Haines in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXIX (Année 1974)
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Titre : Fiber structure and the physical properties of leather Type de document : texte imprimé Auteurs : Betty M. Haines, Auteur Année de publication : 1974 Article en page(s) : p. 96-111 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Propriétés physiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Leather consists mainly of interweaving collagen fiber bundles. The condition of these fibers and the manner in which they interweave constitute the fiber structure of a leather. The physical properties of a leather are the sum of the physical properties of the fiber and the manner of interweaving ; hence there is a close relationship between the fiber structure and physical characteristics of a leather. This paper aims to show, by means of photomicrographs, the influence of certain features of the fiber structure on the physical properties of the leather, and to relate these features to tannery processing. Note de contenu : - Physical properties of full thickness leathers
- Tear strength characteristics
- Creasing and folding characteristicsEn ligne : https://drive.google.com/file/d/17k3_-y-q13YYjAU8VQIAZkvsIA7QW1SE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41362
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXIX (Année 1974) . - p. 96-111[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008508 - Périodique Archives Documentaires Exclu du prêt Influence of proteoglycan removal on opening-up in the beamhouse / K. T. W. Alexander in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXI (Année 1986)
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Titre : Influence of proteoglycan removal on opening-up in the beamhouse Type de document : texte imprimé Auteurs : K. T. W. Alexander, Auteur ; Betty M. Haines, Auteur ; M. P. Walker, Auteur Année de publication : 1986 Article en page(s) : p. 85-102 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Increased understanding of the role played by proteoglycans in determining opening-up, which in many bovine leather processes occurs concurrently with depilation, has enabled us to advance the whole concept of beamhouse work.
By combining selected proteolytic enzymes with conventional unhairing chemicals the tanner is provided with a range of options which include :
1. Accelerated processing
2. Increased opening-up of the fibre structure
3. Improved pulping and/or reduction of the requirement for sulphide
4. Replacement of the traditional bating step
5. Reduction of growth and mottle
6. Increased strength of grain leather
7. Increased area yield
Initial studies with bovine hide showed that the proteolytic action during liming speeded up removal of dermatan sulphate proteoglycan and accelerated the opening-up of the collagen fibre structure, allowing a reduction in sulphide unhairing/liming time from 18 hours to six hours. The effect was most marked in the comparatively difficult to open-up neck region and grain layer. In practical terms this greatly facilitates production of well opened-up wet blue under the constraints of a 24 hour raw to wet blue process.
En ligne : https://drive.google.com/file/d/18-j6ZDcC3cnCx99XgsckcNc86iIySiGg/view?usp=share [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9125
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXI (Année 1986) . - p. 85-102[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008086 - Périodique Bibliothèque principale Documentaires Exclu du prêt Leather defects originating at the farm and at the abattoir / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 2 (03-04/1978)
[article]
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 Langues : Anglais (eng) Catégories : Cuirs et peaux -- Défauts
Cuirs et peaux -- Défauts -- ClassificationIndex. 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 abattoirPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30172
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 62, N° 2 (03-04/1978) . - p. 25-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007118 - Périodique Bibliothèque principale Documentaires Disponible 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)
PermalinkLeather 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)
PermalinkLeather defects originating at the farm and at the abattoir / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 62, N° 2 (03-04/1978)
PermalinkMicroscopy of grain defects of bovine leather / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)
PermalinkMycotic dermatitis and cockle / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TRADES' CHEMISTS, Vol. 54, N° 3 (03/1970)
PermalinkMycotic dermatitis and cockle / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 3 (03/1970)
PermalinkNatural and artificial ageing of sheepskin collagen and its importance in leather manufacture / K. T. W. Alexander in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)
PermalinkQuality rawstock / Betty M. Haines in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIX (Année 1984)
PermalinkRelaxation of isometric tension : a technique for studying the maturity of sheepskin / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 72 (Année 1988)
PermalinkSome properties of pickled hides / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)
PermalinkThe skin before tannage - Procter's view and now / Betty M. Haines in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 68 (Année 1984)
PermalinkThe use of the scanning electron microscope in leather research / Betty M. Haines in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. XXVII (Année 1982)
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