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Indicator Solutions |
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| Operations |
Indicator |
Change of Color-pH |
| Bating |
Phenolphthalein |
Colorless 80 |
Dark Red 9.8 |
| Deliming |
Mehtyl Red |
Red 50 |
Yellow 6.3 |
| Pickling |
Bromophenol Blue |
Yellow 3.0 |
Blue 4.6 |
| Neutralisation of Chrome Leather |
Bromocresol |
Yellow Green 3.5 5.0 |
Blue 6.0 |
| Vegetable tanned Leather |
Tropaeoline 00 |
Red 1.3 |
Yellow 3.2 |
| Bromophenol Blue |
Yellow 3.0 |
Blue 4.6 |
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Source: compiled by Mr. N. Abdur Rahman, CEO of Talco, Vanitec.
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