SDC Classification of Dyes
A class of dyes
Dyes having good leveling and migration properties.
B class of dyes
Dyes having poor leveling or migration properties, which can be dyes uniformly by means of, controlled addition class of dyes. Dyes of poor migration, which require control by temperature, as well as by addition of salt.
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Faster shades on Coir with Reactice Dyes
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Sl. No.
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Name of shades
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% of dye stuff
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Type of coir yarn
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Fastness grade
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Light
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Water
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1
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Castor grey
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2.5% Proceion Blue M 4GD
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Natural
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4
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5
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2
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Celon Blue
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1.0% Procion Brill Blue lMR
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Bleached
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4
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5
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3
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Chalse Dony Yellow
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1.0% Procion Brill Yellow M8G
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Natural
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4
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5
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4
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Claret Bordean
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2.0% Proceion Brill Red M 5B
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Natural
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4
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5
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5
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Eugenia Red
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1.0% Procion Brill red M 8 B
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Bleached
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4
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5
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6
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Lemon
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1.0% Procion Yellow M3R
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Bleached
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4
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5
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7
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Melon
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1.0% Procion Brill Orange M2R
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Bleached
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3&4
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5
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8
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Pacific
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2.0% Procion Brill Blue MGX
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Bleached
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3&4
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5
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9
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Nile
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1.0% Procion Tarqoise MGN
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Bleached
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3&4
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5
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10
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Corn
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2.0% Procion Yellow MGR
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Natural
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3&4
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5
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Test method for banned amines in dyes
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| The dyed material is reduced with sodium dithionate in a nitrate buffered medium. After extraction with a suitable solvent, the amines are identified by means of any of the analytical instruments like TLC, GC, MS or HPLC. The maximum limit of detection of an amine component is 30 mg/kg |
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| Regulation for the detection limit of Banned dyes in different Countries |
Country
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Limit
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France
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30mg/Kg
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Netherlands
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30mg/Kg
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Austria
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30mg/Kg
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Switzerland
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30mg/Kg
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Turkey
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Claims permissible
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Scandinavia
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30mg/Kg
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USA, Canada
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No regulation
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List of Prohibited Dye stuffs
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| C.J.General Name |
C.J.Constn.No |
Diazo components |
| Acid Orange 45 |
22195 |
B |
| Acid Red 4 |
14710 |
o-An |
| Acid Red 5 |
14905 |
o-An |
| Acid Red 24 |
16140 |
o-T |
| Acid Red 26 |
16150 |
Xyl |
| Acid Red 73 |
27290 |
p-Aab |
| Acid Red 85 |
22245 |
B |
| Acid Red 114 |
23635 |
T |
| Acid Red 115 |
27200 |
o-A |
| Acid Red 116 |
26660 |
p-Aab |
| Acid Red 128 |
24125 |
D |
| Acid Red 148 |
26665 |
o-A |
| Acid Red 150 |
27190 |
p-Aab |
| Acid Red 158 |
20530 |
o-T |
| Acid Red 167 |
|
T |
| Acid Red 264 |
18133 |
o-An |
| Acid Red 265 |
18129 |
o-T |
| Acid Red 420 |
|
p-Aab |
| Acid Violet 12 |
18075 |
o-An |
| Acid Violet 49 |
42640 |
B |
| Acid brown 415 |
|
o-An |
| Acid black 29 |
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B |
| Acid black 94 |
30336 |
o-An |
| Acid black 131 |
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B |
| Acid black 132 |
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o-An |
| Acid black 209 |
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T |
| Azoic Diazo component 11 |
37085 |
C |
| Azoic Diazo component 12 |
37105 |
2-A-4.N |
| Azoic Diazo component 48 |
37235 |
D |
| Azoic Diazo component 112 |
37225 |
B |
| Azoic Diazo component 113 |
372230 |
T |
| Basic Red 111 |
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p-Aab |
| Basic Red 42 |
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o-An |
| Basic Brown 4 |
21010 |
2.4-T |
| developer 14=Oxidation |
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| Base 20 |
76035 |
2.4-T |
| Direct yellow 1 |
22250 |
B |
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Treatment of Effluents of Dyeing
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| Modern dye house has its own system for treatment of effluents of dyeing consisting of a collection tank, settling tank, treatment tank and tank for treated dye liquor. The chemicals used for treating effluents of dye liquor consists of alum, bleaching powder and lime which are applied @ 0.7 kg and 1kg per 1000 litres of dye effluents. The treated dye effluents are then sand filtered before settling.However Small ETP units are being constructed for treating 3000 litres of dye effluents at a cost of Rs. 30000/- |
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Parameters tested in effluents of wet processing of coir
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| Characteristics |
Prescribed Limit |
| pH Colour, pt-co |
6-8,5 |
| Suspended solids, mg/1 |
100 |
| BOD, 5 days at 20 degree C, mg/1 |
100 |
| Oil & grease, mg/1 |
10 |
| Chloride, mg/1 |
600 |
| Sulphate, mg/1 |
1000 |
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| The effluents are treated in the effluent treatments tanks and the discharge after treatment have to maintain the following drinking water standards |
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Drinking Water Standards
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| Sl.No. |
Characteristic, mg/l |
BIS |
ICMR |
| 1. |
Colour, Hazen unit |
5 |
25 |
| 2. |
Odour |
Agreable |
Un objectionable |
| 3. |
Turbidity |
10 NTU |
5 JTU |
| 4. |
PH |
6.5-8.5 |
7-8.5 |
| 5. |
TDS |
500 |
500 |
| 6. |
Total Harness (as CaCo3) |
300 |
300 |
| 7. |
Mg |
30 |
50 |
| 8. |
Chloride |
250 |
200 |
| 9. |
Sulphate |
200 |
200 |
| 10. |
Iron |
0.3 |
0.1 |
| 11. |
Manganese |
0.1 |
0.5 |
| 12. |
Copper |
0.05 |
0.05 |
| 13. |
Phenolic compounds |
0.001 |
0.001 |
| 14. |
Flouride |
1.0 |
1.0 |
| 15. |
Nitrate |
45.0 |
20.0 |
| 16. |
Zinc |
5 |
- |
| 17. |
Arsenic |
0.05 |
- |
| 18. |
Calcium |
75 |
75 |
| 19. |
Mineral Oil |
0.01 |
- |
| 20. |
Anionic Detergents |
0.2 |
- |
| 21. |
Chromium |
0.05 |
- |
| 22. |
Cyanide |
0.05 |
- |
| 23. |
Head |
0.10 |
- |
| 24. |
Cadmium |
0.01 |
- |
| 25. |
selenium |
0.01 |
- |
| 26. |
Mercury |
0.001 |
- |
| 27. |
Residual free chlorine |
0.2 |
- |
| 28. |
Alkalinity |
2000 |
- |
| 29. |
Aluminium |
0.03 |
- |
| 30. |
Boron |
1 |
- |
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