I haven't found much talk on color matching, but I've noticed that some contract labs are able to use pantone colors as a benchmark for new products. Are there tools or formulas we can use to formulate color from available organic and inorganic pigments or is it really just trial and error, still? Also, how do you maintain color consistency when there are natural variations in a lot inorganic pigments? (I have 5 shades of ultramarine right now...)
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It is interesting working with someone who works with colours and doing colour matching that they can look at a red colour and determine whether it red with a bit of yellow added to it, or a bit of blue, black, white etc. If you feel you can do this, go ahead.
When colour matching creams and the like, (and I'm by no means an expert at this) I tend to make up solutions of the dyes in say, 1% solutions and 0.1% solutions. Once you know what you need to add to get the right shade then you can calculate what you actually need to add.