Discussion on chrome leather tanning / R. L. Sykes 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. 101-107 Titre : Discussion on chrome leather tanning Type de document : texte imprimé Auteurs : R. L. Sykes, Auteur ; N. Vermes, Auteur ; D. H. Tuck, Auteur ; W. P. Walker, Auteur Année de publication : 1983 Article en page(s) : p. 101-107 Langues : Anglais (eng) Catégories : Chaulage Cuirs et peaux de veaux Formulation (Génie chimique) Retannage Tannage au chrome Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The journal is frequently criticised because its papers practising tanners. In accepting the President's invitation to arrange a panel on the subject of chrome tanning. I am well aware of the many questions which tanning process. Irving, in his 1973 Proctor Memorial abounded but detailed scientific knowledge was lackleast 80% of all leather made in developed countries is likely to contain some chromium. Note de contenu : - I. Introductory remarks - II. Traditional side-leather tanning : Attainnement of objectives - Beamhouse variations - Chrome tanning - The effect of retannages - III. Classical chrome calf tanning - IV. Present chrome tanning practice - Introduction - Factors in chrome tanning - Consideration of chrome-saving options - Factors affecting consistency - Future developments - Table 1 : Beamhouse factors leading to the production of leather - Table 2 : Comparison of liming formulation parameters - Table 3 : Comparison of pickling processes En ligne : https://drive.google.com/file/d/1owxSawzQSU4G8kVjvYaram-0qQq3Qmva/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34190 [article]

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The determination of some physical properties of leather / W. P. Walker in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 54, N° 11 (11/1970)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 54, N° 11 (11/1970) . - p. 398-404 Titre : The determination of some physical properties of leather Type de document : texte imprimé Auteurs : W. P. Walker, Auteur Année de publication : 1970 Article en page(s) : p. 398-404 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux -- Propriétés physiques Matériau plein Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Although entitled "The Determination of Some Physical Properties", this paper deals mainly with the determination of one particular physical property, namely the "fullness". This property is best defined in a negative way in that in a full leather there is an absence of intrinsic stiffness. The fullness of a leather sample is the inverse of the bending modulus. The important word in this definition is intrinsic. A manual assessment of the softness of a leather sample is affected not only by the intrinsic stiffness of the fibre weave, but by the thickness of the leather and by other factors. It is important to the tanner to be able to determine the intrinsic stiffness of the leather. This property of fullness we determine on the Pierce Flexometer. This apparatus was originally used by Pierce' to determine the properties of textiles but was subsequently adapted by Conabere2 of the B.L.M.R.A. to the determi¬nation of leather properties. The experimental work used in this paper was carried out by Lee and Whitton using a version of the Pierce Flexometer. For this paper I have taken as illustrations of the usefulness of fullness determinations, two investigations made in our laboratories, the first concerning the production of a white leather of suitable properties, the second the selection of the best blend of synthetic and vegetable materials for retanning chromed stock. In these experiments, mixtures of two tanning materials were used and the properties of the different leathers obtained from the different tanning mixtures were related to the composition of the mixtures used. Using this method a tanner can find the mixture of tanning materials which will give him the desired characteristics in his leather or, as is more usual, the best compromise in characteristics. En ligne : https://drive.google.com/file/d/1fshmpz7mPIq9vp6fr0ip7KoE_MWpuaRi/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37023 [article]

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