| Titre : |
Grading and sorting |
| Type de document : |
texte imprimé |
| Auteurs : |
Karl Flowers, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 102-107 |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuir et peaux -- Tri
Cuirs et peaux -- Classement
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
The quality of raw materials going into leather manufacture has always been out of the control of the tanning industry. 99% of raw hides and skins that enter the leather industry are a by-product of the meat industry. The farmer does very little to ensure that the surface quality of the animal hide/ skin, beyond the usual practices of good farm management and animal welfare care, are improved. There is little incentive, financial or other, for the farmer to invest time and capital in hide/skin improvement. Consequently, global material quality has been declining for the past 20 years. Increasing numbers of surface marks as a result of natural farm influences are seen. The abattoirs can also be a source of surface marks if the operators have poor training and lack experience. Cost cutting in the meat industry will deprioritise investment in training and capital investment that can improve flay quality.
In some tanneries, there is also a consistent lack of knowledge and quality control that can help in the prevention of tannery related surface marks. A general de-skilling of the leather-making industry and leather article manufacturing result in higher than normal problems due to the general care, consideration, and skill of the operators. |
| Note de contenu : |
- Balancing animal welfare with surface quality
- Animal signatures versus making plastic
- Types of leather surface marks
- Open versus closed marks
- Grading and sorting stages in the tannery
- Sorting routes
- Grading systems (tanners and 5-point grading)
- Grading as a sliding scale
- Cutting coefficients
- Non-pattern and pattern grading
- Fig. 1 : A schematic representation of the locational variations of types of marks on an ostrich skin
- Fig. 2 : Material separation positions and provenance through to wet-blue-sorting
- Fig. 3 : Material grading and sorting decisions defining material down specified routes for better material
- Fig. 4 : material grading and sorting decisions defining material down specified routes for worse quality material
- Fig. 5 : Material grading and sorting decisions defining material down specified routes for splits
- Fig. 6 : An example of the pattern used for the inside quarter of a shoe
- Table 1 : A typical tanner grading system |
| En ligne : |
https://drive.google.com/file/d/1NU12nq_g256TD-9132FIkRKxO8-9w7BR/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33626 |
in INTERNATIONAL LEATHER MAKER (ILM) > N° 37 (09-10/2019) . - p. 102-107
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Grading and sorting in INTERNATIONAL LEATHER MAKER (ILM), N° 37 (09-10/2019)
