CH 20

The chemical texture service that loosens overly curly hair or changes tightly curly or coiled hair into loose curls or waves is ___.

• curl softening

• curl re-forming

• alternate waving

• swelling compound

The layer of the hair that provides te strength and elasticity of human hair is the ___.

• medulla

• regular

• cortex

• arrector

The natural PH of hair is between ___.

• 4-5

• 4.5-5.5

• 6-7

• 7-8

In permanent waving, the size of the curl is determined by the ___.

• position of the rod

• length of the hair

• wrapping of the rod

• size of the rod

The technique of wrapping hair at an angle of 90 degrees or perpendicular to its base section is ___.

• half off-base placement

• on-base placement

• off-base placement

• full-base placement

The two basic types of wrapping the hair around a perm rod are the spiral and ___.

• loop technique

• croquignole per technique

• placement technique

• horizontal technique

A reduction reaction involves either the addition of hydrogen or the removal of ___.

• oxygen

• peroxide

• carbon

• nitrogen

Answer explanation

602

Most cold waves have a pH between ___.

• 9.0-9.6

• 10.0-10.8

• 8.0-9.0

• 7.6-8.4

Answer explanation

604

The three separate components of acid waves are the permanent waving solution activator, and ___.

• conditioner

• stabilizer

• neutralizer

• shampoo

Answer explanation

604

An endothermic wave is activated by ___.

• an ammonia lotion

• an outside heat source.

• a sulfite source

• a reducing agent

Answer explanation

605