EPi manufactures and sells blackening/plating chemistry and produces many finishes. EPI’s Ultra Blak 400 is the premium-grade hot black oxide that costs less to apply and produce a magnetite Fe3O4 smut-free finish. Kool Blak 225 mid-temp blackening process 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 also provides copper-plating processes for munitions, including alkaline non-cyanide copper for lead substrates. (less)