The range of numbers used in the pH scale is _____.

_____ waves are permanent solutions based on sulfites, considered very weak, and are usually marketed as body waves or alternative waves.

Waves that are activated from an outside heat source, such as a conventional hood-type hair dryer, are _____ waves.

What are the basic building blocks of hair that affect how chemical solutions react?

_____ is the measurement of the thickness or thinness of a liquid that affects how the fluid flows.

In permanent waving, the reduction reaction is due to the addition of _____.

All perm wraps begin by sectioning the hair into _____.

The difference in the strength of most chemical hair relaxers is determined by the concentration of _____.

During a relaxer strand test, hair that is pressed to the scalp and continues to curl is _____.

Most acid waves used in salons have a pH value between _____.