Copper Sulfate                                 8-15g/L

Pure Sulfuric Acid                            7-10ml/L

Blackening Agent HN-CB                 90-100ml/L

Temperature                                   15-35℃

Time                                                50-90s

pH Value                                         1-2.5

1. It is suitable for copper and copper alloy oxidation of black color.

2. It has Good luster, smooth surface, good decoration

3. There is good adhesion of coating