Jr. Ch 20 Test Review

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

• Piggyback wrap

• Straight wrap

• Spiral wrap

• Weave technique

What is the most common type of perm rod?

• Straight rods

• Curved rods

• Soft bender rods

• Concave rods

Most alkaline permanent waves have a pH between _____.

• 4.5 and 5.5

• 6.0 and 7.0

• 9.0 and 9.6

• 10.0 and 11.0

Which bonds are relatively weak physical side bonds resulting from an attraction between negative and positive electrical charges, and are easily broken by changes in pH?

• Disulfide bonds

• Salt bonds

• Hydrogen bonds

• Keratin proteins

What is the main active ingredient in true acid and acid-balanced waving lotions?

• Sodium hydrochloride

• Glyceryl monothioglycolate

• Ammonium thioglycolic

• Sodium hydroxide

What determines the size of the curl in a permanent waving process?

• The size of the rod

• The length of the hair

• The texture of the hair

• The color of the hair

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

• stabilized

• endothermic

• exothermic

• acid

Modern acid waves are actually _____ waves, which are permanent waves that have a 7.0 or neutral pH.

• weaker

• stronger

• acid-balanced

• alkaline-balanced

It is important for stylists to remember that ammonia-free does not necessarily mean _____.

• acid-free

• heat-free

• odor-free

• damage-free

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