Joico Acidifier Chemical Enhancer reduces hair swelling caused by chemical services (tints, bleaches, perms). Smoothes and tightens the cuticle. Locks in curl and colour. Deactivates and removes ammonia and peroxide residues. Eliminates perm odour. Chemical Enhancer’s Triamine Complex penetrates deep into the cortex to increase hair strength and resiliency. Use after every chemical service. pH 2.5.