Dataplate Metal Finishing
Trade Secrets
Dataplate can provide customers with chemical formulas for many processes that are the fraction of the cost of proprietary chemistry.
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BLACK CHROMATE PASSIVATE ON ZINC PLATE
DE-IONISED WATER
20g/l SODIUM DICHROMATE
80m/l ACETIC ACID
REDUCE pH 1.5 – 1.8 with SULPHURIC ACID
0.3g/l SILVER NITRATE
IMMERSE WORK IN 1% SODIUM THIOSULPHATE TO FIX BLACK COLOUR BEFORE FINAL RINSE
DO NOT APPLY HEAT TO DRY
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