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Dyeing process for improving properties of black color using natural dyes and mordant / S. C. Lee in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 2 (02/2012)
[article]
Titre : Dyeing process for improving properties of black color using natural dyes and mordant Type de document : texte imprimé Auteurs : S. C. Lee, Auteur ; E. C. Shin, Auteur ; W. J. Kim, Auteur ; S. M. Park, Auteur Année de publication : 2012 Article en page(s) : p. 33-39 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colorants végétaux
Cuirs et peaux -- Teinture
Extraction (chimie)
Fer
Mordançage (teinture)Tags : 'Bois sappan' 'Noix galles' 'Mordant fer' 'Colorant végétal noir' 'Extraction colorants' Alcool 'Liqueur grasse anionique' 'Stabilité frottage' Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : An environmentally friendly nontoxic leather product was produced using two kinds of natural dyes (gallnut and sappan wood) to create a black colorant that can be universally used in leather manufacturing. A chrome free aldehyde and aluminum tanning system was used to prepare the leather for the dye experiments. For the dye preparation experiments gallnut and sappan wood, which are representative polygenetic natural dyes, were extracted by alcohol extraction; then decompressed and refined under concentrating conditions to produce dye in powder form. To produce natural dyed leather with a black color, 5% gallnut and sappan wood were used and the mordant agent, iron mordant (FeSO4·7H2O) at 1% of the leather weight, was applied in three different sequences. Applying the mordant simultaneously produced a superior result compared to it application before or after the application of the natural dye. To evaluate the softness and color change of leather, an anionic fatliquor agent was used at 12% of the leather weight. An excellent dark black color and chroma was obtained on the leather surface as a mordant agent and complex compound. The excellent results obtained during the evaluation of rubbing fastness, K/S (coloring matter concentration of surface), and color difference enabled the conclusion that leather with a deep black color could be manufactured with this method. Note de contenu : EXPERIMENTAL : Materials - Apparatus - Process of eco-leather manufacture - Extraction of natural dyes - Measure of K/S - Measure of color difference - Fastness measuring of natural dyes leather
- RESULTS AND DISCUSSION : pH change by natural dye and mordant content - Effect of mordant content and dyeing process on color - Effect of mordant type on color - Effect of anionic fatliquor agent content on colorEn ligne : https://drive.google.com/file/d/1sfj3_ha8OxTUu7jQigtT5ue4lH-ou9-T/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13568
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 2 (02/2012) . - p. 33-39[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13693 - Périodique Bibliothèque principale Documentaires Disponible 13824 - Périodique Bibliothèque principale Documentaires Disponible Prediction in leather processing : A dark art or a clear possibility ? Procter memorial lecture / Anthony D. Covington in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 95, N° 6 (11-12/2011)
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Titre : Prediction in leather processing : A dark art or a clear possibility ? Procter memorial lecture Type de document : texte imprimé Auteurs : Anthony D. Covington, Auteur Année de publication : 2011 Article en page(s) : p. 231-242 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cuirs et peaux
Cuirs et peaux -- Analyse
TannageTags : Cuir 'Conditions traitement' 'Action mécanique' pH Température Tannage 'Post-tannage' 'Réactions chimiques' Teinture 'Liqueur grasse' 'Influence charge' 'Point isoélectrique' Analyse Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : It is possible to go a long way towards predicting the outcome of changes to both chemical and physical processing conditions in leather development. Predicting the effects of beamhouse processing depends on quantifying the hydrolytic reactions which dominate these steps, the removal of components : this is relatively imprecise because currently the reactions are understood only in the broadest terms or analysis must rely on comparative assessments.
Predicting the effects of fixation reactions, the tanning processes ; is more certain : analysis requires knowledge of the chemical constitution and reactions of the reagents and an understanding of how all reagents interact both with the substrate and each other. This thinking must extend beyond conventional tanning, to include reactions of all dyes and fatliquors and indeed fixation any other reagent bound to the leather in post beamhouse processing.
The link-lock theory of tanning and the stepwise mechanisms of fixation are useful for analysing how the properties of leather are created. Prediction of developmental processing outcomes depends on combining an understanding of the chemistry of leather technology with insights into leather science from the latest thinking about the principles of leather making.
Using the analytical thinking in reverse allows processes and even reagents to be predicted and to be created to produce leathers or collagenic biomaterials with predetermined required properties and performance.Note de contenu : - PROCESSING CONDITIONS : Float length - Mechanical action - pH - Temperature - Time
- TANNING/POST TANNING : Independent reaction - Antagonistic reaction - Synergistic reaction
- POST TANNING : Dyeing - Fatliquoring
- THE INFLUENCE OF CHARGE : Isoelectric point - Applied charge
- REVERSE ANALYSISEn ligne : https://drive.google.com/file/d/14LHrApaHQqzrb3AMI6IJu-kcP_wpxyd4/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12877
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 95, N° 6 (11-12/2011) . - p. 231-242[article]Réservation
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Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 13603 - Périodique Bibliothèque principale Documentaires Disponible