| Titre : |
Influence of animal factors and processing treatments on grain layer and total thickness of cattlehides |
| Type de document : |
texte imprimé |
| Auteurs : |
A. L. Everett, Auteur ; Mary V. Hannigan, Auteur |
| Année de publication : |
1978 |
| Article en page(s) : |
p. 207-221 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
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 -- Epaisseur
Cuirs et peaux de bovins
Peau -- Histologie
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Differences in physical structure between the grain (papillary) and corium (reticular) layers of cattlehides, and especially their final thickness ratio, have important effects on the physical properties of leather. Tanners need more data on the extent of variability of grain layer thickness in rawstock from different sources. The effects of cattle breed, sex, and age on 221 fresh hide biopsy samples from known sources and the effect of body location in seven identified hides were evaluated. While total thickness varied considerably with all factors, depth of grain layer increased very gradually with age and was essentially constant (1.5 to 2.0 mm) after one year. Breed and sex were also minor factors. Extensive data later found in the literature (summarized here) confirm and supplement our results and show that the grain is slightly deeper in colder climates and seasons.
Information was also obtained on the changes in depth of grain layer induced by upper leather processing. Measurements from 168 wet-blue sides and 148 crust sides from 13 different commercial suppliers indicate that grain depth decreases from about 1.7 mm in rawstock to about 1.0 mm at the blue stage, and then to about 0.7 mm in dry leather. Certain retannages and finishing procedures may further modify this value. Correlations between grain and total thickness were relatively weak in rawstock, but stronger and more useful in unsplit blue stock. |
| Note de contenu : |
- EXPERIMENTAL : Rawstock samples - Wet-blue samples - Crust leather samples - Histology - Measurements
- RESULTS AND DISCUSSION : Rawstock measurements - Variation with body location - Wet-blue measurements - Crust measurements - Succession of changes - Correlation of grain and total thickness
- Table 1 : Variation in fresh hide thickness with breed and age
- Table 2 : Variation in fresh hide thickness with sex
- Table 3 : Variation in salted hide thickness (mm) with body location
- Table 4 : Variation in commercially processed side thickness with type of process
- Table 5 : Regression of grain thickness on total thickness
- Appendix table A : Survey of adult european cattle depth of grain
- Appendix table B : Survey of asian, african, and south american cattle depth of grain |
| En ligne : |
https://drive.google.com/file/d/1Ayqe_KSY6m-NyYX7ZEtZbERE42iFnXZp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41151 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 207-221
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Ajouter le résultat dans votre panier Affiner la rechercheComparative physical properties of leather from young bull hides and steerhides in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXIX (Année 1974)
