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

The natural pH of hair is between____________.

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

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

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

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

The process of rearranging the structure of curly hair into a straighter or smoother form is __________.

Thio relaxers usually have a pH above_____________.

Which type of bonds are relatively weak physical side bonds that are the result of an attraction between negative and positive electrical charge?

Chemical solutions __________ the pH of the hair to an alkaline state.

When should you perform an elasticity test?

Porous hair __________.

In permanent waving, most of the processing takes place within the first _______.

A ___________ is a perm wrap in which one end paper is placed under and another is placed over the strand of hair being wrapped.

With extremely curly hair, the twists are __________ sections of the hair strands.

The __________ is the innermost layer of the hair.

Which of the following is a method of hair straightening that combines the use of a thio relaxer with flat ironing?

The reducing agent used in permanent waving solution is commonly referred to as ________.

Which type of perm is recommended for extremely porous hair?