Comparison of the properties of black dyestuffs / J. Berenguer in WORLD LEATHER, Vol. 15, N° 2 (04/2002)  

[article]  inWORLD LEATHER > Vol. 15, N° 2 (04/2002) . - p. 57-64 Titre : Comparison of the properties of black dyestuffs Type de document : texte imprimé Auteurs : J. Berenguer, Auteur ; A. Navarro, Auteur ; M. Dien, Auteur Année de publication : 2002 Article en page(s) : p. 57-64 Langues : Anglais (eng) Catégories : Colorants -- Propriétés physiques Colorants -- Propriétés tinctoriales Colorants -- Toxicologie Noir (couleur) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : More than twenty years ago, the black dyestuff market was almost entirely covered by benzidine or benzidine-derivate dyes. The fact that benzidine is a known carcionegic compond obligeed the development of new black dyes which were not based on benzidine. This stopped the production of these dyes in the developed countries, although still available from the developing sector. The recent German legislation on carcinogenic amines has had the effect of an almost complete elimination of these dyes from the market. Furthermore, the analysis performed on commercial dyes has also led to the conclusion that there is a direct relationship between the use of aniline diazo and the formation of 4-aminobiphenyl, one of the forbidden amines. These two aspects - carcinogenic aromatic amines and metal content - has guided the research to a new generation of black dyes which could overcome these problems. Note de contenu : - DYESTUFFS SELECTED - PHYSICAL PROPERTIES - TOXICOLOGICAL PROPERTIES : Presence of metals in the dyes - Mutagenicy - Presence of aromatic amines - TINCTORIAL PROPERTIES : Fastness levels - Fur dyeing - Leather dyeing - Spectrophotometic measurements - Solubility and stability - Hydrophobic-hydrophilic balance (hhb) values - TOXICOLOGICAL PROPERTIES : Metal content - Mutagenicy - Aromatic amines - TINCTORIAL PROPERTIES : Fastness - Fur dyeing - Leather dyeing - Fig. 1 : Dyes studies - Fig. 2 : Concentration in solution - Fig. 3 : Colour coordinates of the dyes studies - Fig. 4 : Physical properties of the sample - Fig. 5 : HHB values of the anionic dyes - Fig. 6 : Results of the ames test with and without the prival modification - Fig. 7 : Aromatic amines content - Fig. 8 : Fastness results - Fig. 9 : Co-ordinate L* of of the leather substrate in fur dyeing - Fig. 10 : Values for co-ordinate L* in wool dyeing - Fig. 11 : Relative intensity of the dyeings - Fig. 12 : Lightfastness results (72h) - Fig. 13 : Perspiration fastness values on cotton En ligne : https://drive.google.com/file/d/1z7p_QHTmdoedxYM8WSGQYLJWcSiJadgR/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32202 [article]

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