[article]
| Titre : |
Studies on the defects and the economic losses on crust leather resulting from physical damage |
| Type de document : |
texte imprimé |
| Auteurs : |
K. E. E. Ibrahim, Auteur ; Mukhtar Taha Abu-Samra, Auteur |
| Année de publication : |
1987 |
| Article en page(s) : |
p. 68-74 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
In the Sudan, 26 010 cattle, goats and sheep were surveyed for physical defects on hides and skins. Among 16540 cattle surveyed, the incidence of physical defects was 78,2 %. Branding and cauterisation were encountered among 77,4 % of the cattle surveyed. The damage caused by horn rake and scratches by thorns and barbed wire was low in incidence (0.8 %). Among 5250 goats and 4220 sheep surveyed, the incidence of physical damage was low 3,6 % in the former and 2,1 % in the latter species, most of the physical defects being due to scratches caused by thorns and barbed wire.
Branded and cauterised hides were green-graded as rejects. The damage produced was deep and visible even on the flesh side. Such hides were difficult to finish. Moreover, branding and cauterisation caused hardening, reduction in the cutting area and the grain surface of the leather was coarse and showed visible cracks.
Histological sections prepared from branded or cauterised areas showed marked degenerative changes, sloughing of the epidermis and/or scab formation ; the hair follicles were destroyed. There were petechial haemorrhages in the papillary layer and in the dermis. Both the epidermis and dermis showed scar tissue formation.
Leather sections showed distortion and disintegration of both transverse and longitudinal fibres. The fibres towards the grain surface were fluffy and without contours while the fibres beneath were stuck together and stouter than normal.
Leather sections showed distortion and disintegration of both transverse and longitudinal fibres. The fibres towards the grain surface were fluffy and without contours while the fibres beneath were stuck together and stouter than normal.
Leather specimens from branded and cauterised areas lost their durability and could not withstand physical testing. Rejected hides of this type fetched very low pricees resulting in serious economic losses.
An experiment was conducted on the effect of cauterisation on goat skins. The results obtained showed that the damage produced was irreparable through treatment. The data obtained from grading, examination of histological and leather sections and physical testing of the leather from the experimental goats, confirmed the data obtained from the survey. Cauterisation was shown to cause a marked reduction in thickness, weight, durability and apparent density.
It was suggested that animal owners and breeders should be taught to brand their animals on areas which would not affect the value of the hides ans skins and that the faulty practice of cauterisation should be prohibited completely. |
| En ligne : |
https://drive.google.com/file/d/1klz0oUD6UR5Gbe_4UQ6CYrU_z5K2PkLI/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9156 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. N° 71 (Année 1987) . - p. 68-74
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Studies on the defects and the economic losses on crust leather resulting from physical damage in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. N° 71 (Année 1987)
