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Influence of selected process parameters on the reproducibility of aniline dyeings. II. The influences of retanning and dyeing processes of aniline dyeings / Rolf Streicher in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVII, N° 8 (08/1992)
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Titre : Influence of selected process parameters on the reproducibility of aniline dyeings. II. The influences of retanning and dyeing processes of aniline dyeings Type de document : texte imprimé Auteurs : Rolf Streicher, Auteur ; Dietrich Lach, Auteur ; B. Magerkurth, Auteur Année de publication : 1992 Article en page(s) : p. 296-311 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aniline
Cuirs et peaux -- Teinture
Retannage
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In part I of this paper, the influence of wet blues on the reproducibility of aniline dyeings was discussed. The present paper shows the influence of the following parameters on the intensity and levelness of shades :
- Floatlength during retannage
- Temperature during retannage
- Floatlength during dyeing
- Temperature during dyeing
- The physical form of the duestuff before addition
- Running time during fixation with formic acid
Every variation of one of the parameters above was studied using a retannage with a pronounced bleaching effect, a retannage with a low bleaching effect, and two dyestuffs with different build-up properties on retanned leathers.
Results : Short floats and low temperatures in retanning result in dyeings of deeper shades. Variation of the same parameters in the dyeing process gave reversed results. The intensity of a shade is increased by the addition of the dyestuff in dissolved form or as a liquid dye. Variations in retanning and dyeing processes can be compensated better by using a less bleaching retannage and dyeing in steps with a dyestuff having good build-up properties.Note de contenu : - INFLUENCE OF RETANNING AND DYEING PROCESSES ON ANILINE :
- Influence of the neutral salt content of the wetblues
- Influence of float length in retannage
- Influence of temperature during retannage
- Influence of the float length in dyeing
- Influence of temperature during dyeing
- Influence of the physical form in which the dyestuff is added
- Influence of the drumming time with formic acid for the fixation of dyestuffs
- Fig. 1 : Influence of retanning and dyeing processes on aniline dyeings
- Fig. 2 : Retanning methods applied
- Fig. 3 : Method for the assessment of dyeings
- Fig. 4 : Influence of neutral salt content on aniline dyeings
- Fig. 5 : Influence of float length during retanning on aniline dyeings
- Fig. 6 : Influence of temperature during retanning on aniline dyeings
- Fig. 7 : Absorption of white tanning agent in relation to temperature
- Fig. 8 : Influence of float length during dyeing process on aniline dyeings
- Fig. 9 : Influence of temperature during dyeing process on aniline dyeings
- Fig. 10 : Absorption of acid brown 161 in relation to temperature
- Fig. 11 : Influence of form in which the dye is added on aniline dyeings
- Fig. 12 : Influence of drumming time with formic acid on aniline dyeingsEn ligne : https://drive.google.com/file/d/1lsyEGrRJuqLcCwMqUih_Bxavio3ShAUw/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39842
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVII, N° 8 (08/1992) . - p. 296-311[article]Réservation
Réserver ce documentWays and means of hiding grain defects in drum dyeing - Technical note / Rolf Streicher in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVIII, N° 6 (06/1993)
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Titre : Ways and means of hiding grain defects in drum dyeing - Technical note Type de document : texte imprimé Auteurs : Rolf Streicher, Auteur Année de publication : 1993 Article en page(s) : p. 207-216 Langues : Américain (ame) Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : The requirements on the quality of drum dyed leather has increased steadily in recent years.This trend is due to the increasing demand for straight aniline, or only slightly finished leathers.This development is confronted with the increasingly poorer quality of the available rawstock.Efforts should therefore be made to hide grain faults to a large extent already during drum dyeing.The parameters promoting the accentuation of grain faults during the tanning, retanning and dyeing processes were therefore investigated.Comparative trials were carried out to determine the effect of tanning,retanning and dyeing on the coloring of grain faults.Furthermore, the influence of the chemical structure of retanning agents,dyeing auxiliaries and dyes on the quality of the resulting dyeings was investigated.Another part of this paper deals with the application of pigment preparations during drum dyeing.The results of the study show that it is possible to hide grain faults to a certain extent by the use of appropriate retanning and dyeing processes,specific dyeing auxiliaries,selected dyes, and aniline dyes in conjunction with special pigments. En ligne : https://drive.google.com/file/d/1eABVQlVR2I31WNbBiJTsGCVVmiUA-1ZM/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8220
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVIII, N° 6 (06/1993) . - p. 207-216[article]Réservation
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