Friday, May 18, 2012
11:54 PM
Reasons for Why so Called Sulpher Dye | Popularity of Producing Black Shades with Sulpher Dyes | Comparison Between Sulpher Dyes & Vat Dyes
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Dye–S–S–Dye (Water insoluble Sulpher dye molecule)
Popularity of Producing Black Shades with Sulpher Dyes:
1. Low cost
2. Fair to good light fastness
3. High Wash fastness
4. Easy to apply
5. Low energy required
6. Chemical resistance is moderate to good.
7. Wide range of shades especially on heavy, durable shades on apparel fabric.
Comparison between Sulpher & Vat Dyes:
Subject | Sulpher Dye | Vat Dye |
1. Molecular Size | 1. Dye molecules are very Large | 1. Smaller than Sulpher |
2. Shade | 2. Gives dull shade due to varying conditions | 2. Gives bright shades |
3. After reduction | 3. Smaller size molecules are obtained D–S–S–D+[H] à D–SH + SH–D | 3. Vat dyes are reduced . |
4. Fabric Dyed | 4. Cotton, Rayon, Nylon & P/C | 4. Cellulose Rayon etc |
5. Hydrolysis | 5. Under high temperature and Humidity | 5. Susceptible to hydrolysis i.e. easy to Hydrolysis. |
6. Wash Fastness | 6. Good to very good | 6. Excellent |
7. Price | 7. Cheaper than Vat dye | 7. Very costly dye |
8. Light fastness | 8. Good to very good | 8. Excellent for anthraquinone. |
10. Sulpher linkage | 9. Contain Sulpher linkage | 9. No Sulpher linkage is present. |
10. Ionization | 10. The dye molecules are negatively ionized after reduction | 10. Same |
Label :
sulpher dye
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Textile Technology: Reasons for Why so Called Sulpher Dye | Popularity of Producing Black
Shades with Sulpher Dyes | Comparison Between Sulpher Dyes & Vat Dyes
. Dye–S–S–Dye (Water insoluble Sulpher dye molecule) Popularity of Producing Black Shades with Sulpher Dyes: 1. Low cost 2. Fair to good ...
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