Ch 20 Chemical Texture Service (GgL 23)

In permanent waving, panels of hair are divided into smaller subsections called ___.

• rod sections

• base sections

• outer sections

• placements

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

• stablilized

• endothermic

• exothermic

• acid

what is a very effective technique for blending between perm rods with opposite base directions using zigzag partings to divide base areas?

• basic permanent wrap

• curvature permanent wrap

• spiral perm wrap

• weave technique

what is the active ingredient in all hydroxide relaxers?

• hydrogen ion

• keratin ion

• peroxide ion

• lithium ion

What is another name for the double-rod wrap technique?

• piggyback wrap

• straight wrap

• spiral wrap

• weave technique

Caution should be used with on-base rod placement to avoid additional ___.

• sectioning of hair

• stress and tension on hair

• increased volume

• curl patterns

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

• 5.5 and 6.5

• 7.8 and 8.2

• 9.0 and 10.0

• 10.1 and 10.5

The___ measures the acidity and alkalinity of a substance by measuring the quantity of hydrogen ions it contains.

• oxygen content

• pH scale

• salinity

• radioactivity level

The cortex of the hair is made up of millions of polypeptide chains cross-linked by three types of side bonds that are responsible for the elasticity and strength of the hair. these bonds are ___.

• disulfide, trisulfide, and hydrogen

• disulfide, salt, and hydrogen

• disulfide, salt, and oxygen

• disulfide, chlorine and hydrogen.

The ___ uses one end paper folded in half over the hair ends like an envelope.

• single flat wrap

• double flat wrap

• bookend wrap

• spiral wrap