Biting fly damage on bovine leather - An alternative source of 'light spot' damage / P. J Stosic in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 84, N° 4 (07-08/2000)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 84, N° 4 (07-08/2000) . - p. 159-164 Titre : Biting fly damage on bovine leather - An alternative source of 'light spot' damage Type de document : texte imprimé Auteurs : P. J Stosic, Auteur ; P. J. Hadley, Auteur ; G. C. Coles, Auteur ; D. Shearer, Auteur ; P. C. Garnsworthy, Auteur Année de publication : 2000 Article en page(s) : p. 159-164 Note générale : Bibliogr. Langues : Anglais (eng) 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 -- Défauts Cuirs et peaux de bovins Mouches Taches (défauts) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : During the grading processes of leather, one of the most common downgrading defects is ‘light spot’. Small scale trial work has established that a form of ‘light spot’ was produced on bovine crust leather after the live animal had been exposed to biting flies (specifically Stomoxj’s calcitrans). The resultant damage was found to have sharper boundary edges, compared with the diffuse edges associated with lice ‘light spot’ damage. The ‘light spots’ were grouped closely together and were of a more consistent, regular size and shape than either lice or demodex damage. The fly damage penetrated into the corium layer of the skin, beyond the superficial grain enamel loss associated with lice damage. Note de contenu : - Light spot damage : Biting flies - Economic losses associated with biting flies - Outline of trial : Pathology results - Leather damage results - Table 1 : Examples of different ‘light spot’ damage faults on leather and the causal agents En ligne : https://drive.google.com/file/d/1z19d235x_v9h_ArQ2V7zlZeyaM3RZOLC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40999 [article]

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Raw material quality issues / P. J. Hadley in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. C, N° 4 (04/2005)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. C, N° 4 (04/2005) . - p. 142-148 Titre : Raw material quality issues Type de document : texte imprimé Auteurs : P. J. Hadley, Auteur ; P. C. Garnsworthy, Auteur Année de publication : 2005 Article en page(s) : p. 142-148 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The investment in raw material represents by far the single largest cost to the leather processor yet it is the element that he frequently has the least control over. The life cycle of meat animals offers many opportunities for damage to occur including on the farm, during transport, slaughter, and preservation. Work at BLC has investigated the impact of ectoparasites, specifically the biting louse, Bovicola bovis, on hide quality and appropriate measures to control this commonly occurring pest. In trials involving over 500 cattle, the impact of exposure and treatment with commercial ectoparasiticides was evaluated and leather quality and value assessed accordingly. Animals slaughtered while infested with lice gave hides with low grades and significant levels of light spot and fleck damage. Animals slaughtered having been cleared of lice for a minimum of 6 weeks gave hides with reduced levels of fleck and this improved further up to 13 weeks, although full resolution of damage did not occur. Animals kept lice free throughout their 2 year life span consistently gave hides of high quality with no light spot damage. A further trial evaluated the impact of treating calves at 12 weeks of age and keeping them lice free to slaughter at 2 years compared to calves that did not receive lice treatment in their first year. The untreated calves developed natural lice infestations and their hides displayed higher levels of light spot damage at both chrome tamed and dyed crust stages. The findings of this work suggest that lice cause damage to bovine hides that may demonstrate elements of resolution or healing but is unlikely to resolve completely following treatment. En ligne : https://drive.google.com/file/d/1o4seRQufRjScD_38dz6_FujMk1SNuh4z/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4070 [article]

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