Functions and Uses：
1. Environmental-compliant product.  It is free of hexavalent chromium and can generate a bright homogenous blue and bright coating.
2. Applicable to the extensive range of application, either manual or automatic processes.
3. The result of salt spray test reaches up to 96 hours or more when used in conjunction with NCZ-48 cyanide alkaline zinc.

Operating Components：
BK-3                          50~100mL/L
Time                         10~40s
PH                             1.5~2.0
Temperature           18~30℃