Re: problem with black dye
When black dye turns out bluish it is often because the anodizing layer is too thin, so extending the anodizing time or using more amps per square foot will probably help. As far as the gold dye, it should just take a few minutes to a half hour if everything is else is ok, if it takes all night something is not right. The dye PH does make a significant difference on many colors, even some black dyes, so check that out too.
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