Severe discoloration or hair damage can result when attempting to perm hair treated with products containing:

• metallic dyes/salts

• ammonia

• aniline derivatives

• hydrogen peroxide

For optimum bonding, most neutralizers remain in the hair for ____ minutes

The main difference between a perm and a body wave is the:

• size of the rods

• strength of the perm

• processing time

• neutralizing time

Hair that looks curly when wet but feels harsh and damaged when dry is:

• resistant hair

• in need of re-perming

• underprocessed hair

• overprocessed hair

To help determine in advanced how a client’s hair will react to a perm, it is necessary to do a:

• strand test

• preliminary test curl

• predisposition test

• patch test

The main active ingredient in neutralizer is:

• sodium hydroxide

• ammonium thioglycolate

• hydrogen peroxide

• hydrochloric acid

The length of time required for the hair strands to absorb the waving lotion and the bonds to rearrange is called:

• Processing time
• Reaction time
• Setting time
• Waiting time

A perfectly processed perm should break what percent of the disulfide bonds?

If you suspect that metallic salts are present, mix one ounce of 20 volume peroxide with 20 drops of 28%:

• ammonia water

• bleach water

• rose water

• hydrogen water

The method used to rebuild and reharden the hair after it has been processed is called:

• reformation

• reduction

• neutralization

• hydrogenation