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Color change in formulation
Hi guys,
I have a question regarding color changes in my formulation. I formulated a concentrate (water-free) with a mix of glycols as solvents, and a few surfactants (sulfates, and APGs mostly).
The resulting concentrate is yellowish. However, after a few days in the lab, it turned brownish. Any idea why?
As far as I know, there are no photo-sensitive prime materials (correct me if i’m wrong), and the concentrate is stored in a closed bottle, so no contact with air for oxidation.
I’m new here but, I like the concept of this website. I hope you will be able to help.
PS: I used the exact same formula for a dozen of batches, and the colors seem to make a gradient.
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