Analysis of dying by using fiber-optic spectroscopy with partial least-squares techniques / E. Mäntysalo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 383-392 Titre : Analysis of dying by using fiber-optic spectroscopy with partial least-squares techniques Type de document : texte imprimé Auteurs : E. Mäntysalo, Auteur ; M. Marjoniemi, Auteur ; E. Walsh, Auteur Année de publication : 1990 Article en page(s) : p. 383-392 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Dying process in the fur, leather and textile industries generally deal with multi-component systems presenting multi-collinearity and interferent problems. In this case the rational Multiple Linear-Regression (MLR) analysis fails. At TUT in the Laboratory of Fur and Leather Technology (LFLT) fiberoptic spectroscopy with the Partial Least-Squares (PLS) techniques is used to analyse multi-component systems with interferent components and multicollinearity problems and with noisy signals. In order to predict chemical compositions of a multi-component system from spectroscopic information it is necessary to create concentration and absorption matrices which are used to create a calibration model. Using the model and applying PLS data-manipulation techniques it is possible to predict unknown concentrations. In this research the PLS technique is applied in the analysis of acid dying process using a number of dye solutions. The results are promising and possible further applications of this technique are being investigated. En ligne : https://drive.google.com/file/d/1PQ74HzKRGrAakZRTJWRDdYX_XkP4USPS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8736 [article]

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Anisotropy of physical-characteristic functions of fur leather / E. Mäntysalo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 4 (04/1991)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 4 (04/1991) . - p. 133-140 Titre : Anisotropy of physical-characteristic functions of fur leather Type de document : texte imprimé Auteurs : E. Mäntysalo, Auteur ; M. Marjoniemi, Auteur ; E. Kemppinen, Auteur Année de publication : 1991 Article en page(s) : p. 133-140 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : According to recent investigations carried out in the LFLT the leather of fur has properties which must be considered anisotropic in nature contrary to those considered true random variables. Leather properties are functions of orientation angle and position coordinates of samples. Results are given for the leather of male and female blue fox (Alopex lagopus) and scan black mink (mustela vision) in the cases of breaking and elongation experiments. Four sample groups of fox leather (46 foxes) and one sample group of mink leather (21 mink) of different backgrounds as random subsets from the production of the year 1988 were investigated. All leathers were aluminum-tanned. En ligne : https://drive.google.com/file/d/13RsAmGvys9SODIb98TKVr7l6qER81g6a/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8506 [article]

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Automatic determination of shrinkage temperature from shrinkage data of leather / E. Mäntysalo in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIX, N° 2 (02/1994)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIX, N° 2 (02/1994) . - p. 35-38 Titre : Automatic determination of shrinkage temperature from shrinkage data of leather Type de document : texte imprimé Auteurs : E. Mäntysalo, Auteur ; M. Marjoniemi, Auteur Année de publication : 1994 Article en page(s) : p. 35-38 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : It is difficult to determine the beginning of the shrinkage-temperature distribution of leather(Ts).Earlier it was the practice to do this visually. It is possible to determine Ts automatically by applying a condition for the first derivative of the measured shrinkage data. A linear-curve fitting method is applied for the length-temperature data below a tested Ts and for from the next five to ten sample-data points resulting in two lines. A condition that the first derivative of the latter line should be four times the first derivative of the former line gives satisfactory results. En ligne : https://drive.google.com/file/d/1OKGbmYmQaGEbNksfU4EH03McWh1fiF3Q/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8111 [article]

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Investigations of uniaxial straining of fur in skin state : Part 1 / K. Rouvinen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 75 (Année 1991) . - p. 122-125 Titre : Investigations of uniaxial straining of fur in skin state : Part 1 : Effects of straining on skin length, contraction and fur characteristics Type de document : texte imprimé Auteurs : K. Rouvinen, Auteur ; P. Niemelä, Auteur ; M. Marjoniemi, Auteur ; E. Kemppinen, Auteur ; E. Mäntysalo, Auteur Année de publication : 1991 Article en page(s) : p. 122-125 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study attempts to clarify the effect of straining in the conservation of mink and blue fox skins on their length, contraction in dressing, and their general fur characteristics. 80 blue fox and 88 scan black mink skins were divided into four groups each and submitted to the following experimental treatments before fixing them onto stretching boards and drying : no straining, manual straining (muscle power), straining with a load of 200N and a load of 400N. The skins were measured for their initial fresh length, for dried length, and also for dressed length. The fur characteristics were evaluated in the dried raw skin state after 3 months storage before dressing. The length of the raw skins increased with increased straining load in minks and blue foxes. Contraction of the skins in the dressing process was also the more pronounced the stronger the strain had been, but all of the skins returned to their initial fresh length. In blue foxes, the fur characteristics were significantly affected by straining. Colour purity, mass and quality class deteriorated when the straining load was raised. In minks, straining did not affect fur quality in the dried raw skin state, but nearly half of the skins strained with the strongest load appeared to be shapeless and pouch-like after dressing. The fact that pricing at auctions is determined by skin size has brought a temptation to 'create' more length in conservation. This leads, however, to an undesirable deterioration of skin elasticity in dressing, but it should be even and kept with reasonable limits, or the fibre structure of the skins will be permanently damaged. En ligne : https://drive.google.com/file/d/1rQ6AXdLqZCi8ljX47kszRAFa9-0dbo3U/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8686 [article]

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Investigations of uniaxial straining of fur in skin state : Part 2 / M. Marjoniemi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 75 (Année 1991)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 75 (Année 1991) . - p. 166-171 Titre : Investigations of uniaxial straining of fur in skin state : Part 2 : Effects of straining on physical characteristics in leather state Type de document : texte imprimé Auteurs : M. Marjoniemi, Auteur ; E. Kemppinen, Auteur ; E. Mäntysalo, Auteur ; K. Rouvinen, Auteur ; P. Niemelä, Auteur Année de publication : 1991 Article en page(s) : p. 166-171 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Uniaxial strain of varying magnitude was applied to skins of male and female blue fox (Alopex lagopus) and male scan black mink (Mustela vison) in the conservation process. Effects of the strain along the line of the backbone on physical characteristics, i.e. elongation at break, breaking load, breaking energy and tensile strength were investigated for a number of selected leather samples by using a previously reported special sampling set system. According to the results obtained in this work the mechanical strain has a considerable effect on the physical characteristics of fox leather. The effect is not so clear in the case of strained mink leather. On the basis of the results obtained in this work it is concluded that fox and mink leather can be strained with a load of 400 N. Even in this case the breaking load remains a high enough value to meet the lower acceptable value for breaking load. Straining with a load of 400 N along the line of the backbone only to some extent homogenizes the tensile and elongation behavior of the leather with respect to the transverse direction. En ligne : https://drive.google.com/file/d/14fB_3UZL0ZPvT_pYI6ZUAU2Rx3nc9DUj/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8690 [article]

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Spectroscopy and modelling : a new generation in leather technology / M. Marjoniemi in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 79, N° 2 (03-04/1995)  

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