W-75 Black Nickel is kind of tin and nickel alloy, this process is widely applied for various decorative playing to acquire a black layer; it can be used on antic brass and antic copper.  

Feature：

1、 This process does not contain any poisionous material and it is helpful for safe production.

2、 The blackness on high and low current area are even and unified, with stable color and easy operation.

3、 It is suitable for both rack and barrel plating.  

2. Condition and Composition

Opeartion after plating

Washing is make it clean and to prevent tarnishing, please go through Potassium Dichromate solution for passivation. This process requires lacquer sealing, or elase, layer will get oxidization.