Examen
Psi cosmetology theory exam
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Psi cosmetology theory examSoft Water/ Rain water - Best for shampooing and allows shampoo to lather freely Hard Water - Minerals that lessen the ability of the shampoo to lather Purified water/Deionized water - Main ingredient in shampoo Surfactant - has two ends the HYDROPHILIC HEAD and LIPOPH...
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