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General Leather Retanning Process
The amount of material used is calculated as blue leather weight.
Wash: 300% water (20 degrees), turn LOMIN, row bath.
Wash: 300% water (20 degrees), turn 5 min, row bath.
Neutralization: 200% water (20 centigrade), 1.5% baking soda, turn 50min, row bath.
Wash: 300% water (50 degrees), turn LOMIN, row bath.
Dyeing: 200% water (50 degrees), 0.5% dye, 30min, x% formic acid (pH=3.5 3.6), turn LOMIN, row bath.
Fatliquoring: 100% water (50 centigrade), 1.5% sulfated fish oil, 1.5% calf oil, 30min, x% formic acid (pH3.5 3.6), turn l0min.
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