Perm

Difference Between Alkaline and Acid Perm
Acid perm lotion is gentler and has a pH value of approximately 6 to 7. Alkaline perm lotions have a stronger pH value of approximately 9.5. They use ...
Difference Between Alkaline Perm and Acid Perm
Acid perm lotion is gentler and has a pH value of approximately 6 to 7. Alkaline perm lotions have a stronger pH value of approximately 9.5. They use ...