Reactive ME Series Dyes (Bifunctional)
| 0.5% DYEING 4.0% |
REACTIVE ME Series Dyes (Bifunctional) |
C.I. No. |
General Properties |
Fastness Properties |
Suitability | |||||||||||
| Sub- stanti- vity |
Solubi lity at 500C |
Dis charge ability |
Day Light 1/1 | Wash ing ISO4 |
Perspiration | Hypo- chlorite Bleach |
Pero- xide Bleach |
Exha- ust 40oC & 60oC |
One Bath Pad Batch | One Bath Pad-Dry Stream |
Printing | |||||
| Alka- line |
Acidic | Steam | Sili- cate |
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 |
Yellow ME4G 150% |
Y.186 | M | 120 | G | 6 | 4 | 4-5 | 4-5 | 1 | 4 | + | (+) | – | + | + |
 |
Yellow MERL 150% |
Y.145 | M | 100 | G | 5 | 3-4 | 4 | 4 | 1 | 3-4 | + | (+) | + | + | + |
 |
Orange ME2RL150% |
O.122 | H | 75 | P | 5 | 4-5 | 4-5 | 4-5 | 3 | 4 | + | + | + | + | + |
 |
Red ME4BL 150% |
R.195 | H | 100 | P | 5 | 4-5 | 5 | 5 | 1 | 4 | + | + | + | + | + |
 |
Red MERB 150% |
R.198 | H | 100 | P | 5-6 | 5 | 5 | 5 | 1 | 3 | + | + | + | + | + |
REACTIVE ME SERIES DYES are mixed Bifunctional reactive dyes where Vinyl Sulfone group is linked to chromophore through a mono chloro triazine group as a bridge link. They are applicable on cellulosic material at lower dyeing temperature 60oC. The main features of these ‘Bifunctional’ dyes are as under:
- The dye-fibre bond between Vinylsulfone group and cellulose is stable to acid hydrolysis, so that stability of dyed goods in industrial acidic atmosphere is very good with the time lapse.
- The dyes which are not fixed during the dyeing process can be washed off easily because the hydrolyzed dye has low substantivity and thus there is a little risk of staining of adjacent whites.
- Excellent leveling properties.
- Better reproducibility in dyeing.
- High exhaustion and high fixation efficiency.
- Good all round fastness properties.
Bi-functional dyes are applicable on cellulosic materials by dyeing as well as printing methods.
| Affinity or Substantivity on cotton | |||
|---|---|---|---|
| L | = Low | + | = Suitable |
| M | = Medium | (+) | = Fairly Suitable |
| H | = High | – | = Not Suitable |
| V | = Very High |
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| Dischargeability | |||
| G | = Good | Light | 1 to 8 in increasing order |
| F | = Fair | Washing & other |
1 to 5 in increasing order |
| P | = Poor | O | = Orange |
| Y | = Yellow | V | = Violet |
| R | = Red | Br | = Brown |
| B | = Blue | G | = Green |
| Bl | = Black | ||
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