Specification for sealed Hardcoat Anodizing

Usually hard coat anodize is not sealed, because the sealing process softens the hard coat and it doesn't wear as well.

From what I can read of the context, it seems that you would like the wear performance of the hard anodize with the appearance of the black dye. You will probably not be able to achieve both, there is a tradeoff. Hard anodize does not hold dye well because it is not as porous as the thinner anodizes. (It still has some pores but they are much deeper than they are wide, and so getting enough dye to absorb in the anodize will be difficult). And you would probably need to seal the anodize to prevent the dye from leaching out, and again, that helps to defeat the usual purpose of hard anodizing, which is to improve wear performance. Hope this helps.

Most job jobs will seal a dyed coating (type 3, or type 2) in a solution containing nickel acetate. As long as the seal is of good quality, you'll get a dyed coating that won't fade in a short period of time when exposed to light, and also won't be prone to staining by fingerprints, or liquids that these parts may come in contact with.

If it is dyed, then it MUST be sealed, so say "sealed".