CHAPTER 20-CHEMICAL TEXTURES

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 the strength and elasticity of human hair is the:

• medulla

• regular

• cortex

• arrector

The natural pH of hair is between:

• 4.0-5.0

• 4.5-5.5

• 6.0-7.0

• 7.0-8.0

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 perm technique

• placement technique

• horizontal technique

A reduction reaction involves either the addition of hydrogen or the removal of:

• oxygen

• peroxide

• carbon

• notrogen

Most cold waves have a pH between:

• 9.0 and 9.6

• 10.0 and 10.8

• 8.0 and 9.0

• 7.6 and 8.4

An endothermic wave is activated by:

• an ammonia lotion

• an outside heat source

• a sulfite source

• a reducing agent

Permanent wave solution should be rinsed from the hair for at least:

• 2 minutes

• 10 minutes

• 15 minutes

• 5 minutes