... coloring process, such as champagne, copper, bronze color. Product featuresNG-P6 electrolytic coloring additive is made up of several effective compositions ... - 18 VPH : 0.8 - 1.2Continuous Consumption (per ton) : NG-P6 2 kgs, Tin sulfate 1 - 2 kg, Nickel sulfate 1 ... .2 kg, Reagent Sulfuric acid 1 - 1.5 kg. NG-P6 Electrolytic Coloring Additive