After the hair is rinsed, Phase II is applied to lock in the bonds to their new, straighter configuration. Because of the base and the formula itself, AntiCurl is able to smooth the hair, remove frizz, eliminate much of the curl and completely eliminate perms without damaging the hair. The difference is strengths is the amount of buffers in the product and the amount of sodium hydroxide. As a rule, the mild is best for color-treated and finer hair textures. Regular is for most people and is used to relax or retexturize hair.
Extra strength is for very coarse hair or culr that is resistant to relaxing.
What to Expect Thioglycolic acid relaxers, which tend to be milder and less damaging, last about a month before the curl begins tightening. In resistant hair, it can come back in as little as two weeks. Sodium hydroxide relaxers, which tend to work better on ethnic hair, last forever. The relaxation cannot be reversed. No matter what type of product you use, keep your expectations realistic.