Shampoo PH

by Suzanne Fields
(TX)

What is the proper PH for hot process shampoo? I added hydrolized silk and it looks like it is about an 8.5 is that ok. This is my first time.

Answer:

Are you asking about liquid soap making or solid shampoo bars? For shampoo bars that sounds fine since handmade soap bars typically have a pH of around 7 - 10 though most often closer to the 10 than the 7.

Since my knowledge of soap making is more to the solid form rather than liquid, I grabbed Catherine Failors book on "Making Natural Liquid Soaps". She mentions that 9.5 to 10 for a pH level of liquid soap is normal.

Check out her book, especially page 14 where she talks about using phenolphthalein to determine the alkalinity or acidity of liquid soap.

Cathy