Chapter 20: Chemical Texture Services (perm waving)

Texture services can be used to ____________________ straight hair, _____________________ overly curly hair, or ____________________ tightly coiled hair.

____________________ services are hair services that cause a chemical change within the hair's natural wave or curl pattern.

The exterior layer of the hair

• cuticle

• cortex

• medulla

The middle layer of the hair

• cuticle

• cortex

• medulla

What does pH stand for?

The substance that has a pH below 7

• acid

• alkaline

• neutral

The substance that has a pH above 7

• acid

• alkaline

• neutral

Chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together

• keratin proteins

• disulfide bonds

• salt bonds

• hydrogen bonds

Relatively weak physical side bonds that are the result of an attraction between negative and positive electrical charges

• keratin proteins

• disulfide bonds

• salt bonds

• hydrogen bonds

Weak physical side bonds that are the result of an attraction between opposite electrical charges

• keratin proteins

• disulfide bonds

• salt bonds

• hydrogen bonds