Hot Temperature 140–200° F

For Industrial Use

Ultra-Blak 420

Hot black oxide formulated for a variety of copper, copper-plated, and copper-alloyed surfaces.

Alkaline solution is used at a temperature of 140–200° F and produces a deep-black finish with superior abrasion resistance. A true copper oxide finish.  Meets military specification MIL-F 495E.

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There is a small fee for samples shipped in the continental U.S. This can range from $10–$75. Products shipped outside the continental U.S. can be subject to certain restrictions. Freight charges may range from $75–$300.