Compressibility measurement and the objective assessment of softness of light leathers / B. Lokanadam in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 73 (Année 1989)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 73 (Année 1989) . - p. 115-119 Titre : Compressibility measurement and the objective assessment of softness of light leathers Type de document : texte imprimé Auteurs : B. Lokanadam, Auteur ; V. Subramaniam, Auteur ; R. C. Nayar, Auteur Année de publication : 1989 Article en page(s) : p. 115-119 Note générale : BIbliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A simple method is desribed for measuring numericallythe softness of leathers based on compressibility. This method could be of value in the assessment of the quality of leather objectively and semiquantitatively. Current practices in the assessment and grading of leathers, at least in the case of softness of gloving and garments leahters, are based on subjective methods. Unlike the case of sole leathers, the development of instrumental methods for measuring flexibility, rigidity, bending, compresssion, etc. for the evaluation of soft leahters, for example grain garment, has so far been difficult. Further, many of the testing procedures for leather evaluation are based on destructive techniques. This paper presents a non-destructive method attempts to define the degree of softness of leather using an easily measured parameter such as compressibility. The method which seems suited especially for light leathers consists of compressing the leather surfaces laterally in between two flat objects with an increasing load. The changes in thickness in a given time were analysed as a function of the load intervals. Compression indices thus obtained seem to correlate with the tactile assessment of softness of grain garment leathers, with higher negative slope angles being associated with softer leathers. En ligne : https://drive.google.com/file/d/1yV1TbjwY1yhEmybqA8baI05lyeC0G19Z/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8835 [article]

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Effect of finish thickness on the gloss of coated leathers / B. Lokanadam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 378-386 Titre : Effect of finish thickness on the gloss of coated leathers Type de document : texte imprimé Auteurs : B. Lokanadam, Auteur ; N. Ramanathan, Auteur Année de publication : 1978 Article en page(s) : p. 378-386 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique) Cuirs et peaux -- Finition Polyacryliques Polymères en émulsion revêtements -- Epaisseur Revêtements organiques Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The gloss of the surface of finished leathers was found to increase with the thickness of the finish film. It also increased with the plating pressure up to a limit, beyond which the gloss decreased, probably due to the development of microcracks. The gloss was found to increase with the smoothness of the leather surface as seen in photomicrographs of the surface and of surface contour observed in cross-sections of the leathers. Phase-contrast optics used in conjunction with darkfield illumination revealed details flot seen by other optical microscopical methods. Note de contenu : - MATERIALS AND METHODS : Preparation of leathers for finishing - EXPERIMENTAL : Measurement of finish thickness - Reflected light microscope - Phase contrast microscop - RESULTS AND DISCUSSION - Table 1 : Characteristics of the acrylic resin emulsion - Table 2 : Amount of resin plus pigment coating material applied on corrected grain impregnated leathers En ligne : https://drive.google.com/file/d/1ceOF3QxTcWWoS1Q-ESD-8OKaHyhv3iQ-/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41157 [article]

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