Pyroglo Copper Plating Process Description Application: A Cyanide-free pyrophosphate-based Copper plating process with excellent throwing power. It is used for decorative plating of faucets, thru-hole plating of PCB's and other applications. The Growel Advantage: It contains all desired product categories namely dull and semi-bright and glossy deposits resembling that of acid copper. It is suitable for use in difficult to plate substrates like Zinc based die-casting with deep, low current areas. get a quote