EPi manufactures and sells blackening chemistry, which guarantees a variety of black finishes. EPI’s Ultra Blak 400 is the premium-grade hot black oxide. It costs less to apply and produces a magnetite Fe3O4 smut-free finish. Kool Blak 225 is a mid-temp blackening process. It blackens steel at 225–245 °F without the boiling, caustic fumes of traditional hot black oxide, and produces a magnetite Fe3O4 smut-free finish.
E-Kleen cleaners and E-Tec rust preventives complete the finish.
EPi offers copper plating processes for munitions and alkaline non-cyanide copper for lead substrates. (less)