Functions and Uses：
1. Completely free of hexavalent chromium and specialized formulated for acid zinc and alkaline cyanide zinc.
2. GHB-89 is a black coating agent different from the ordinary nickel salt treatment.
3. Applicable to the rack plating.  It can generate a homogenous glossy black appearance.
4. In combination with the sealing agent, the time white rust formed is in between 72 to 120 hours in the Neutral Salt Spray Test.

Operating Components：
CHB-89A                   80~120mL/L
CHB-89B                   60~100mL/L
Time                           60~90S
PH                               2.0~2.5
Temperature             25~35℃