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Ultra-Blak 400

Powdered salts used at 5.75 lbs/gallon, dissolved in water and used at 285 F for black oxide finishes on steel per Mil-C-13924C, Class 1.

Ultra-Blak 404

Black oxide salts for blackening cast iron at 250 F.

Ultra-Blak 407

Blackens stainless steels at 250 F per Mil-C-1 29240. Class 4.

Ultra-Blak 420

Blackens copper and brass at 200 F.

Ultra-Blak 455

Blackens cadmium and zinc at 160 F.

Ultra-BIak 465

Black chemical conversion finish for nickel at 160 F.

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