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Dolphin 'VS' Dyes are based on β-sulfatoethylsufone reactive system. These dyes have low to medium substantivity/reactivity for cotton and therefore better recommended for padding and printing applications. However, the substantivity of majority of the dyes of this group is greatly enhanced after the addition of alkali, because of the generation of vinlsulphone from dye from its precursor and therefore can be used for exhaust dyeing also.
Exhaust Dyeing (Winch/jet dyeing): All-in Process — full amount of salt, soda and part of caustic soda are added to the bath at the beginning. The pre-dissolved dye is added in two portions and temperature is raised to the required level. The remaining caustic soda is added and dyeing is continued for 60–90 min. Pad-Batch Dyeing: Dissolve the required amount of dyestuff in hot water and cool to room temperature. Mix the dye solution with alkali just before padding. Pad the fabric through the solution at 25–27°C and batch for 20–24 hrs.
| General Properties Solubility g/l at 30°C | General Properties Application | Fastness Light | Fastness Washing | Fastness Perspiration | Rubbing | Chlorinated Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1% Shade | 4% Shade | Product Name Reactive # (C.I. No) | In water at 30°C | With 50gpl common salt at 30°C | With 50gpl Glauber's salt at 30°C | With 50gpl comm. Salt & 20gpl soda ash at 30°C | Exhaust Dyeing | Pad Batch Dyeing | Exhaust Dyeing / Fixation Temp (°C) | Preferred Electrolyte (Glauber's / Common Salt) | Optimum % shade for economical dyeing | Suitability for light / pastel Shades | Dischargeability | (1.0%, 2.0% shade) (ISO-105-B02) | (1.0%, 2.0% shade) (AATCC 16E, 20 AFU) | ISO-3 (Effect / Stain) | ISO-4 (Effect / Stain) | Acid (Effect / Stain) | Alkaline (Effect / Stain) | Rubbing (Dry / Wet) | Chlorinated Water (Effect Stain) |
1% | 4% | Reactive Blue 19 #Blue 19 | 200 | 20 | 100 | 10 | S | NS | 60°C | GS | 6 | LS | P | 6, 6-7 | 4, 4 | 4-5, 5 | 4, 4 | 5, 4 | 5, 4 | 4, 3 | 3, 4 |
1% | 4% | Reactive Blue 220 #128416-19-3 | 100 | 40 | 80 | 10 | S | S | 60°C | GS | 6 | S | G | 6, 6-7 | 4, 4 | 4-5, 5 | 4, 4 | 5, 4 | 5, 4 | 4, 3 | 3, 4 |
1% | 4% | Black-5 #20505 | 100 | 100 | 100 | 30 | S | S | 60°C | CS/GS | 10 | NS | G | 5* | 3-4* | 4, 4 | 4, 3-4 | 4, 4 | 4, 4 | 4, 2-3* | 1-2, 2-3 |
1% | 4% | Black-31 #2580-78-1 | 100 | 50 | 50 | 20 | LS | S | 60°C | CS/GS | 5 | LS | G | 5-6, 6 | 3-4, 4 | 4, 4 | 4, 3-4 | 4, 4 | 4, 3-4 | 4, 2-3* | 2-3, 4 |
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