Re: Black turns bronzy black
Sounds like your current density is a little low, and could be causing desolution (acid eats the ano film as it's being built).
I'm guessing that your using the let-r-fly method... not a very accurate way of anodizing.
If you're using a 12v battery charger, you should consider a CC/CV power source. 12v is going to give you grief, especially hard to dye colors like black and red.
Also, why aren't you heating the dye? Could be the problem right there, except that you said the dye is leaching into the sealer, which leads be to believe the pores have been eaten too big from desolution. Are you using anodizing dye?
Even if you up your acid concentration, you will be limited by your power source (assuming it's a 12v power source).
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Specializing in anodized graphics in Paintball guns.
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