YC-42/YC-42R is a traditional palladium sulfate type catalyst activator with excellent functions.

YC-42 modified the defects of copper surface, solder resist green paint and substrate resin attack on the same type of products on the market.

Good, it also solves the problem that the copper ion concentration in the activation bath rises too fast, bridging infiltration plating, single point copper exposure or yin and yang color

Poor and other issues.