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
Inspecting the action of the relaxer by smoothing and pressing the strand to the scalp is called:
periodic strand testing
To check relaxer processing, smooth and press a strand to the scalp using the back of the comb or your finger. If the curl returns,__________
continue processing
When applying hydroxide relaxer on virgin hair, the processing cream is applied last to the______and ______.
scalp area, hair ends
The product is applied first to the__________when performing a sodium hydroxide retouch.
new growth only
What product is used to restore the hair to a normal acidic pH?
Normalizing lotion
The best type of shampoo to use after the chemical relaxer is a:
neutralizing shampoo
A hair relaxing treatment should be avoided when an examination shows the presence of;
scalp abrasions
Of the general types of hair relaxers, which one does not require pre-shampooing?
Sodium hydroxide
What is one safety precaution that must be followed with all chemical hair relaxing services?
Wearing protective gloves
