Blue Dye ZN BLUE DYE 160 CONC Physical Properties: Dark Blue Liquid Description ZN BLUE DYE 160 produces an uniform metric blue appearance on zinc plated parts when used with any blue chromating solution.ZN BLUE DYE 160 can be applied on chromated zinc plated parts from alkaline cyanide-free, acid chloride, and cyanide zinc plating baths. Equipment Tank: PP or PVCHeater: Stainless Steel