CH 20 Chemical Texture Services

Tough exterior layer of hair that protects it from damage

Innermost/center of hair often called pith or core of hair

pH is an abbreviation for..

pH represents quanity of...

______ measures the alkalinity and acidity in a substance

When the pH of hair is risen to an alkaline state, it ____ & ____ the hair shaft.

The basic building blocks of the hair are...

also called end bonds, they are chemical bonds that join amino acids together

The cortex is made up of millions of polypeptide chains cross-linked by 3 types of side bonds:

a 2-step process in which the hair goes through a physical change(wrapping the hair in rods) & chemical change(breaking the disulfide bonds.

The concentration of the reducing agent, thio, gives the perm waves its _____

A 2nd factor that gives a perm its strength is _____ __ ______

What is the active ingredient in a perm solution?

Another name for alkaline wave

If the scalp shows any signs of ________ do not preform perm/chemical service

If the hair has had a ________ ________ we cannot do a perm.

______ _____ ______ is a process in which curly hair is restructured into a straighter or smoother form

this type of relaxer uses a thio relaxer with flat ironing

A hydroxide relaxer removes a sulfur atom from a disulfide bond and converts it into a _______ _______

Sodium hydroxide is a _____-relaxer

No Mix, No Lye Relaxer

The strength of the relaxer is determined by the amt. of _____

Keratin straightening treatments work by fixing the keratin in _____ in a semi permanent manner

Where do you start a chermical relaxer application?

If you don't use caution in plaxing the rods in hair you can cause additional ______ & tension on hair

Which base placement minimizes stress and tension on hair

Placing the rod at a certain direction/angle is called ____ ____

2 methods of wrapping hair

_______ perm wrap is wrapped from the ends to the scalp in overlapping concentris layers

double-rod wrap also called

wrapping following the curvature of the head

offsetting the rods one row to another is _____ wrap

Cold/Alkaline Waves range a pH of ______

All acid waves have 3 separate components:

Modern acids waves that have 7.0 or neutral pH

Waves that use cystamine & mercaptamine instead of Ammonium Thiogycolate

In a perm, the basic processing time takes..

The most common neutralizing agent

Wrap using one paper

subsections of panels into which hair is divided for a perm