Direct Dyes
| 1% shade |
Direct Dyes | C.I. No. |
Light | Washing | Neutral Discharge |
Alkaline Discharge |
 |
Yellow 3GX Yellow 6 |
40001 | 4 | 2-3 | 4 | 2 |
 |
Paper Yellow GL Yellow 11 |
40000 | 4 | 2-3 | 4 | 2 |
 |
Yellow 2R Yellow 28 |
19555 | 2-3 | 2 | 2 | 1 |
 |
Light Fast Yellow 2G Yellow 44 |
29000 | 4-5 | 3-4 | 5 | 4-5 |
 |
Supra Yellow RL Yellow 86 |
29325 | 4 | 2 | 2 | 2 |
 |
Orange SE Orange 26 |
29150 | 3-4 | 2 | 3-4 | 3 |
 |
Orange 2GS Orange 34 |
– | 6-7 | 3 | 2 | 2 |
 |
Light Fast Orange 4R Orange 37 |
– | 3-4 | 2 | 3-4 | 3 |
 |
Orange 2GL Orange 39 |
40215 | 6-7 | 3 | 2 | 2 |
 |
Fast Scarlet 4BS Red 23 |
29160 | 3 | 3-4 | 4 | 4 |
 |
Red 12B Red 31 |
29100 | 1-2 | 2-3 | 3 | 3 |
 |
Red 5BS Red 81 |
28160 | 3 | 4 | 4-5 | 4 |
 |
Light Rose FR Red 227 |
– | 4 | 4 | 4-5 | 4 |
 |
Violet MB Violet 9 |
27885 | 4 | 2 | 5 | 4-5 |
 |
Helio B Violet 51 |
27905 | 4 | 2 | 5 | 4-5 |
 |
Light Blue G Blue 71 |
34140 | 5 | 3-4 | 5 | 5 |
 |
Turq. Blue GL Blue 86 |
74180 | 6 | 1-2 | 3 | 2 |
 |
Blue Blue 106 |
– | 6 | 1-2 | 3 | 2 |
 |
Turq. Blue FBL Blue 199 |
74190 | 5-6 | 4 | 2 | 2 |
 |
Brown MN (None – Benzidine) |
– | 4 | 4 | 4-5 | 4 |
 |
Dark Green P Green 1 |
– | 4 | 4 | 2 | 2 |
 |
Green Green 89 |
– | 4 | 4 | 2 | 2 |
 |
Black BV Black 22 |
35435 | 2 | 3-4 | 4 | 3-4 |
 |
Black OB Black 80 |
31600 | 2 | 3-4 | 4 | 3 |
 |
Black 2G Black 155 |
– | 2 | 3-4 | 4 | 3-4 |
 |
Diazo Black BH-NB Black 165 |
– | 2 | 3-4 | 4 | 3-4 |
 |
Black SC Black 168 |
– | 3 | 3-4 | 4 | 3-4 |
 |
Black SBF Black 170 |
– | 4 | 3-4 | 4 | 3-4 |
Light Fast dyes are direct non-benzedene dyestuffs, suitable for dyeing cotton and viscose in the form of fabric, yarn as well as loose cotton. They are also used for dyeing of wool, pure silk & leather in certain cases.
| Affinity or Substantivity on cotton | |||
|---|---|---|---|
| L | = Low | + | = Suitable |
| M | = Medium | (+) | = FairlySuitable |
| H | = High | – | = NotSuitable |
| V | = VeryHigh | ||
| Dischargeability | |||
| G | = Good | Light | 1to 8 in increasing order |
| F | = Fair | Washing& other | 1to 5 in increasing order |
| P | = Poor | O | = Orange |
| Y | = Yellow | V | = Violet |
| R | = Red | Br | = Brown |
| B | = Blue | G | = Green |
| Bl | = Black | ||
The dyestuff is pasted with cold water dissolved by pouring 50 to 100 times its weight of boiling water with stirring.
Direct dyestuffs are dyed from a neutral or alkaline dyebath depending on individual dyestuffs. The dyeings are exhausted with the addition of Glaubers salt or common salt. The quantities to be added are as follows:
For Light Shades
- 0.5%
- Soda Ash
- 5 – 10%
- Glauber’s Salt Calc. or common salt.
For Medium & Dark Shades
- 1 – 2%
- Soda Ash
- 15 – 20%
- Glauber’s Salt Calc. or common salt.
The addition of soda ash to the dyebath may be omitted while dyeing blends containing Acetate Rayon where the Acetate component is to be reserved.
The dye-bath is set at 50 – 60oC with soda ash, salt and dissolved dyestuff. The boild out yarn is then entered and worked for 15 minutes. The dye-bath temperature is raised to 90-95oC in 15 to 20 minutes. In order to overcome unlevel dyeing, salt may be added after about 15 minutes of initial dyeing.
For improving the fastness to washing of Surya Direct dyestuffs, we suggest an after treatment with dye fixing agent. The dyed goods are treated in a fresh bath containing 2 to 3 gms/litre Dye fixing agent for 30 minutes at pH 6-6.5 at 45oC, The material is then rinsed and dried.
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