Getting the true color from a dye is highly subjective and depends on the types of controls you are using during the anodizing process. I have purchased many of the Caswell dyes and tried most of them with somewhat good results. I’ve found that good results depend on a number of factors;
1. Proper mix using distilled water
2. Tight PH control especially with red dyes where I mantain a PH range between 5 & 6.
3. Acid bath temperature (I try to keep my bath temperature between
69 and 72 degrees F)
4. Dissolution, The more dissolution you have the larger the pours in your anodized coating. Larger pours readily accept dyes especially with reds. I tend to watch the voltage decrease somewhat on my CCR before stopping the process. The colors turn out richer with deep color saturation.
5. Dyeing time, when I’m dying a piece I check it constantly. If I’m matching a color I’ll pull the piece and rinse it before comparing.
You will never see true colors using a color chart it doesn’t matter if you’re sizing up dyes or paint. Color charts are Ball Park accurate. The best way to determine color grading is to buy the dyes and test them.
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