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Dyeing Method

A. 3% Dyeing Method for Grain Leather ( % are based on shaved wet blue weight )

Process Products % Time(min) Remark
Wasing Water 200 35
Formic Acid 0.2
Degrerasing Agent 0.2 30
Rinse
Rechroming Water 150 35
Chrome Syntan 2.0
Natural Synthetic Fat 1.0 60
Drain
Neutrailzation Water 150 35
Neutrailzing Syntan 2.0
Sodium Formate 2.0 20
Sodium Bicarbonate 1.0 40 pH:4.8
Rinse
Retanning & Dyeing Water 50 35
Acrylic Polymer 2.0
Melamine Syntan 3.0
Resin Syntan 3.0
Phenol Syntan 1.0
Leveling Agent 1.0
Dyestuffs 1.0 50 Check Penetration
Water 150 60
Formic Acid 1.5 20 pH:3.8
Rinse
Fatliquoring Agents Water 200 60
Fatliquoring Agents 8.0 50
Formic Acid 1.0 20
Rinse