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:

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

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

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

Most cold waves have a pH between:

An endothermic wave is activated by:

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

The process of rearranging the structure of curly hair into a straightener or smoother form is:

Thio relaxers usually have a pH above:

Lithium hydroxide and potassium hydroxide relaxers are often advertised and sold as:

Which type of rod is also known as a circle rod?

For on-base placement, the hair is wrapped at ____ beyond perpendicular to its base section, and the rod is positioned on its base.

When should you preform an elasticity test?

True acid waves have a pH between:

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

One safety precaution of permanent waving is to:

If the client's hair has been treated with a hydroxide relaxer, it means the hair:

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

Which type of rods are usually about 12 inches (30.5 centimeters) long with a uniform diameter along the entire length of the rod?

The ____ is the innermost layer of the hair.

The chemical bonds that join amino acids together are called:

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

Which type of relaxer requires the application of a protective base cream to the entire scalp prior to the application of the relaxer?

The middle layer of the hair is the:

Which of these terms refers to the angle at which the rod is positioned on the head: horizontally, vertically, or diagonally?

A ____ is a type of wrap that uses one end paper folded in half over the hair ends like an envelope.

A ___ is a wrapping pattern in which all the rods within a panel move in the same direction and are positioned on equal-sized bases.

Which of these are usually classified as a lye-based relaxer?

A ___ is a type of wrap in which the hair is wrapped on one rod from the scalp to midway down the hair shaft, and another rod is used to wrap the remaining hair strand in the same direction.

Hydrogen bonds can be broken by:

An endothermic chemical reaction is one that absorbs ___ from its surroundings.

Mild-strength relaxers are formulated for: