| Titre : |
Microscopic study of leather defects : I. Veininess in glazed calfskin |
| Type de document : |
texte imprimé |
| Auteurs : |
A. L. Everett, Auteur ; H. J. Willard, Auteur ; J. Naghski, Auteur |
| Année de publication : |
1966 |
| Article en page(s) : |
p. 112-127 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuirs et peaux -- Défauts
Défaut de veine (cuir)
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Prominent blood vessel pattern on the grain surface of leather is an esthetic defect which has long been troublesome and costly to the industry. In spite of numerous attempts to solve the problem, as summarized from the literature, the basic cause of the defect remains unknown. Inadequate curing and drastic processing were most frequently suspected, but so far there has been no conclusive proof. Therefore a continuing search for preventive measures would seem less practical than systematic testing of corrective treatments.
Microscopic examination of cross-sections, improved by a suitable aqueous embedding technique, is shown to be helpful in guiding such a program. Studies of blood vessel distribution have established that they are typically arranged in three layers. The deepest and largest vessels, especially the arteries, are the principal offenders in this problem, but it is shown that their depth can be so variable that shaving is not a dependable solution. More significantly, there is almost always a large void space around the deep vessels in veiny leather but not in non-veiny samples, even from skins processed together in the same tannery pack. Thin skins are an especially difficult problem. The suggested approach for correction would be to fill there voids, either by plumping the fibers with a suitable retannage or by the use of impregnating materials. Cross-sections illustrating an experimental zirconium retannage indicate a definite reduction in void space and in consequent veininess. Likewise a resin treatment, being studied elsewhere, seems quite promising af ter preliminary trials. |
| Note de contenu : |
- EXPERIMENTAL METHODS : Sectioning - Gelatin embedding - Microscopy
- RESULTS AND DISCUSSION : Veiny vs. non-veiny skins - Veiny thin skins -Veniness without void space - Veniness reduced by retannage |
| En ligne : |
https://drive.google.com/file/d/1kS5RRAvgc4pKf9T4XiHF_7NrLb0vAQTw/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37939 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXI (Année 1966) . - p. 112-127
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Microscopic study of leather defects in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXI (Année 1966)
