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What is the difference between acid and exothermic perms?

April 26, 2017acid exothermic perms

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What is the difference between acid and exothermic perms?

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Exothermic perms contain ingredients that generate their own gentle heat and improve penetration of wave lotion. Acid perms produce permanent hair waves with curls that are actually softer than an alkaline perm. It also has a pH from 6.5 to 8.0.