Do you know how to test cosmetic pH? In most cases, the pH of cosmetics should be tested straight – as the product comes – in cream, lotion, gel, or foaming gel form. Only in rare cases, like bars and powders to be mixed with water before application, should the product be diluted before testing pH. Otherwise, pH should be tested in the finished product, as it is. Belinda Carli, Director of Institute of Personal Care Science, explains why and also provides you links to other great information videos on how to prepare pH buffer solutions, and how to check and adjust pH in your cosmetic formulas. Find out how, watch now!

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