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Black anodized (Type 2,Grade 2)

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Dear Sirs,
Here we meet the question about "black anodized (Type 2,Grade 2)"
We don't know what kind of "black anodized (Type 2,Grade 2)"
Hot or cold? This black anodizing is hard black anodizing? or others?
Thanks in advance for your help.

Wangjun
mechanical part co. - Changzhou, Jiangsu, Cn
2006

Hello Wangjun. This probably is referring to MIL-A-8625 / MIL-PRF-8625 [on DLA] or AMSA8625 type II conventional (68-72 deg F.) sulfuric acid anodizing, dyed black. Try to get a copy of the spec, or clarification from your customer; good luck with it.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2006

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