Black anodize dye doesn't take

[AlanJB]

I black anodized a part.

The part was cleaned, anodized in battery acid and then dipped in distilled water with a few drops of Caswell black dye. Everything went well.

I have tried the same process several times again with different parts. No matter what I do he parts do not take the dye.

I do not understand why the process doesn't work.

Can anyione suggest what I'm doing wrong?

[lcaswell]

We'll need a LOT more information to help you with this....firstly, you made the dye by adding a few drops of dye to distilled water How much distilled water, and how many drops, of what size? Without specifics, it will be next to impossible to help you.

Did you read the instructions? These chemicals, dyes included, have specific makeup requirements. If you don't follow them, you're guaranteed to fail.

Have you read the anodizing procedures, and many posts here?