Cosmetics Formulation Development

I have a question about using the color. There is D&C Red27 that changes the color. I want to ask if I put it in the lip formula, what should I do to make the lip color light and then apply it to a dark color? There is no water in the formula.

The lip gloss is clear, but when you apply it and change the color, ask about the color. that must be the type of color

Hello, related question. Please inquire within the same thread. D&C Red 27 Color Changing Pigment Color Changes color from light pink to dark pink when pH changes. When pH is less than 2 it is colorless and when pH is in the range of 3.5-5 it turns pink. in the formula that wants to change the color When applied to the skin, adjust the pH of the formula to below 2 and then apply the pigment. D&C Red 27 Color Changing Pigment to dissolve in the formula When the formula is applied to the skin, the pH will rise to 3.5-5 because the skin has a pH of about 4-6, causing pink on the skin.