| Titre : |
The lightfastness of dyestuffs and leathers |
| Type de document : |
texte imprimé |
| Auteurs : |
Bernd Kahne, Auteur ; Jurgen Brosi, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 53-56 |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorants
Cuirs et peaux -- Teinture
Essais accélérés (technologie)
Photostabilité
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Lightfastness, particularly for furniture and garment leathers, is a major issue, and tanners are experiencing more technical problems in leather dyeing than previously encountered.
When grain leathers were finished using pigments, the lightfastness was largely dependent upon the properties of the pigment used. However, today the dyestuff is often the main component for lightfastness.
Demands can vary depending on the intended purpose of the leather. While a lightfastness of grade 3 is sufficient for shoe upper leathers, the market asks for grade 3-4 for garment leathers and, for upholstery, a lightfastness of grade 4. These values apply for both full grain and velour leathers and are influenced by the following factors:
- Dyestuff selection (type/structure).
- Shade depth (dyestuff amount/dye procedure).
- Leather type.
- Characteristics of tannage, retannage and fatliquor.
- Physical and chemical properties of the leather and conditions within dyeing process. |
| Note de contenu : |
- Lightfastness and the type of dye
- Shade intensity, normed dye intensity (RT), and absorptive ability
- Lightfastness in relation to colour intensity
- Dyeing leathers using combinations of dyestuffs
- The influence of chemicals used in leather manufacture
- The technical issues
- Fig. 1 : Lightfastness related to metal
- Fig. 2 : Standardises normed dye intensities (RT)
- Fig. 3 : The build-up properties of fast acid brown ANP on full chrome and retanned leathers
- Fig. 4 : Lightfastness test IUF - 402
- Fig. 5 : Lightfastness test IUF - 402
- Fig. 6 : The darkening effect of vegetable extracts
- Fig. 7 : The effect of vegetable extracts on colour chrome |
| En ligne : |
https://drive.google.com/file/d/1wOTldisePmjccFEK09Q5RW8xFr1u4Wh7/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32268 |
in WORLD LEATHER > Vol. 15, N° 5 (08-09/2002) . - p. 53-56
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