Flat and predictable leather / Walter Landmann in WORLD LEATHER, Vol. 18, N° 3 (05/2005)  

[article]  inWORLD LEATHER > Vol. 18, N° 3 (05/2005) . - p. 29 Titre : Flat and predictable leather Type de document : texte imprimé Auteurs : Walter Landmann, Auteur ; Richard Daniels, Auteur Année de publication : 2005 Article en page(s) : p. 29 Langues : Anglais (eng) Catégories : Cuirs et peaux de bovins Homogénéisation (technologie) Peaux brutes -- Structure Surfaces (Physique) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Hides and skins are naturally rounded and fully contoured to the shape of the living animal. In addition the skin allows flexibility of movement and protection, but these needs vary according to the area being covered. Some parts, such as the belly areas, need no stretch easily while other areas, such as the butt and backbone, are thicker, denser and less exendable. One of the main leather making tasks is to produce a flat leather. However the leather must also show greater uniformity in terms of elasticity and shape retention to be useful as a material in the manufacture of an end product. The liming process starts to address the problems of curvature and separation of the fibre structure. This leads to a general flattering in the finished leather as the fibres can move more readily. Moreover, a major relaxation occurs during the fleshing operation as the membrane-like tissues are cut from the flesh side of the hide, as these restrict and confine movement. This is especially noticeable in the peripheral parts of the hide-bellies and shanks-and in the growthy neck areas. The hides relax further during the deliming/bating, and degreasing if appropriate, with the beefits largely maintained during the tanning process. If managed correctly, the process not only stabilises the hide, but also maintains a flat grain with minimised draw and growth. Note de contenu : - Stretch : aiming for cross-hide uniformity - Shape retention and set - Additional information - Panel EI/I : The effects of splitting/shaving to substance En ligne : https://drive.google.com/file/d/1CC4umEFzhtoqcEJUyMhZD0RS0_y3lhfh/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32461 [article]

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Modifying the skin structure / Richard Daniels in WORLD LEATHER, Vol. 18, N° 7 (11/2005)  

[article]  inWORLD LEATHER > Vol. 18, N° 7 (11/2005) . - p. 34 Titre : Modifying the skin structure Type de document : texte imprimé Auteurs : Richard Daniels, Auteur ; Walter Landmann, Auteur Année de publication : 2005 Article en page(s) : p. 34 Langues : Anglais (eng) Catégories : Cuirs et peaux Peaux brutes -- Structure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Before first time drying and the formation of a flat stable substrate, the conversion of hides and skins into leather can be viewed as two distinct stages. Note de contenu : - The removal of unwanted skin components - The location of specific materials within the collagen structure - The outcome of undected change - PanelE8/1 : Collagen fibre structure in butt and belly areas En ligne : https://drive.google.com/file/d/1WV1aFvxWMW_cHiBe-CmVDqex6IyUOcmK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32496 [article]

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Studies of the cause of the vertical fibre hide structure in hereford cattle hide / J. H. Dufty in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 67 (Année 1983) . - p. 70-73 Titre : Studies of the cause of the vertical fibre hide structure in hereford cattle hide Type de document : texte imprimé Auteurs : J. H. Dufty, Auteur ; D. E. Peters, Auteur ; J. H. Bavinton, Auteur Année de publication : 1983 Article en page(s) : p. 70-73 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Analyse Cuirs et peaux de bovins Peaux brutes -- Structure Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The cause of the vertical fibre hide structure and the factors influencing its prevalence were studied in 362 Hereford cattle. The condition wasdiagnosed in 83 (22,9 %) cattle and was not affected by the sex of the animal, the year and season of its birth, gestation period, birthweight, or the presence or absence of horns, nor by the age, parity and weight of the dam. Significant differences in the frequency of the condition were found in animals grouped according to their sires or dams and evidence was obtained that the condition was due to the presence, in a homozygous state, of an autosomal recessive gene. Note de contenu : - MATERIALS AND METHODS : Animals - Feed - Management and bredding - Skin sampling - Experimental studies - RESULTS : Factors influencing the prevalence of vertical fibre in hides - Table 1 : Prevalence of the vertical fibre hide structure in 362 Hereford cattle classified according in their sire - Table 2 : Prevalence of the vertical fibre hide structure in 281 Hereford cattle classified according to their sex and sire - Table 3 : Prevalence of the vertical fibre hide structure in Hereford cattle classified according to their sire and year and season of birth - Table 4 : Frequency of hide types in the offspring of 64 Hereford cows mated in each case to the same bull for two successive years - Table 5 : Post-calving weight (kg) of dam and birthweight (kg) and gestation period (days) of offspring classified according to the hide type of both animals - Table 6 : Frequency of the vertical fibre hide condition in families of various sizes where at least one affected offspring was produced by parents with a non-vertical hide En ligne : https://drive.google.com/file/d/1CUsCyKMT6mL-yeRkOjrKOe_UFT5dzfQH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34188 [article]

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The characterisation of vertical fibre and high weave structures of Hereford cattle hide / D. E. Peters in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 67 (Année 1983)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 67 (Année 1983) . - p. 65-69 Titre : The characterisation of vertical fibre and high weave structures of Hereford cattle hide Type de document : texte imprimé Auteurs : D. E. Peters, Auteur ; J. H. Bavinton, Auteur Année de publication : 1983 Article en page(s) : p. 65-69 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des données Caractérisation Cuirs et peaux -- Analyse Cuirs et peaux de bovins Microscopie Peaux brutes -- Structure Statistique Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Previous workers have identified two types of fibre architecture in hides from hereford cattle which result in weak leather. The two types were called vertical fibre and the intermediate form of vertical fibre and they were considered to be forms of the same condition. In this study it is shown that the two forms (here referred to as vertical fibre and high weave) are clearly separable by microscopy of fresh hides but with more difficulty in the case of split leather. Also, vertical fibre and high weave have a different incidence depending upon the breed of the animal. It is suggested that whereas vertical fibre is a specific condition, high weave is probably a form of the normal weave. Thus it is concluded that vertical fibre and high weave are independent although similar structural forms and they both produce weak leather. Note de contenu : - EXPERIMENTAL : Hide samples - Microscopic examination - Statistical analysis of data - RESULT : Microscopy - Proportion of weave types - DISCUSSION : Normal weave - High weave En ligne : https://drive.google.com/file/d/1-btsGGH8kQ304i67XhF2HJpT-s6XCNoy/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34187 [article]

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