EPi manufactures and sells blackening/plating chemistry producing many finishes. EPI's Ultra Blak 400 is the premium grade hot black oxide that costs less to apply producing a magnetite Fe3O4 smut-free finish. Kool Blak 225 mid temp blackening process blackens steel at 225-245 F with out the boiling caustic fumes of traditional hot black oxide producing a magnetite Fe3O4 smut free finish. E-Kleen cleaners and E-Tec rust preventives complete the finish. EPi also provide copper plating processes for munitions including alkaline non-cyanide copper for lead substrates. (less)