Ch. 20 Chemical Texture Services Pt. 2 Flashcards
What process permanently rearranges the basic structure of curly hair into straight or smooth form?
Chemical hair relaxing
The most common types of chemical hair relaxers are ammonium thio, guanidine hydroxide, and:
sodium hydroxide
The measurement of the thickness or thinness of a liquid that affects how the fluid flows is known as:
viscosity
Before giving a relaxing treatment to curly hair, the cosmetologist must perform an analysis of the client’s hair and scalp, testing for porosity and_____________on several areas of the head.
elasticity
In _____________, the process by which hydroxide relaxers permanently straighten hair, the relaxers remove a sulfur atom from a disulfide bond and convert it into a lanthionine bond.
lanthionization
Relaxers that are ionic compounds formed by a metal combined with oxygen and hydrogen are known as:
metal hydroxide relaxers
Sodium hydroxide relaxers are commonly called:
lye relaxers
The action of a guanidine hydroxide, or no-lye, relaxer causes the hair to:
soften and swell
_____________relaxers are intended for use on color-treated, damaged, or fine hair.
Low-pH
Hydroxide relaxers are usually sold in___________formulas.
base and no base
The scalp and skin are protected from possible burns when using a base hair relaxer by applying:
base cream
Application of the relaxer for a retouch begins in the most resistant areas, usually at the back of the head or:
under the occipital bone
If using a “no base” relaxer, a protective cream may be applied:
to the hairline and around the ears
General guidelines suggest that for fine, color-treated, or damaged hair, a _____________strength relaxer should be used.
mild
General guidelines suggest that for coars, extrememly curly, and resistant hair, a ___________strength relaxer should be used.
strong or super