Position:Home > Products > Dyeing processDyeing reference prescription of cow leather
(% is based on the weight of the wet chrome tanned leather after shaving).
| Wetting and degreasing | ||
| 200% | water | 35℃ |
| 0.2% | Degreasers | 30 minutes PH=3.6~3.8 |
| Wash | ||
| Retanning neutralization | ||
| 150% | water | 35℃ |
| 4.0% | Chrome powder | 40 minutes |
| 2.0% | Neutralizers | |
| 1.0% | Sodium formate | 20 minutes |
| 1.0% | Baking soda | 90 minutes PH=4.8~5.0 |
| Wash | ||
| Retanning | ||
| 100% | water | 35℃ |
| 3.0% | Acrylic tannins | 60 minutes |
| 3.0% | Resin tannins | 50 minutes |
| Wash | ||
| Staining and fatliquor | ||
| 100% | water | 35℃ |
| 1.0% | leveling agent | 10 minutes |
| X% | Dyes | 40 minutes |
| 6.0% | Grease | 30 minutes |
| 100% | water | 70 °C for 20 min |
| 0.4% | Formic acid | 15 minutes |
| 1.0% | Formic acid | 25 minutes PH=3.8~4.0 |
| 1.0% | Cationic oil | 20 minutes |
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