milady ch 21

Clients who have their hair colored usually visit the salon every:

• 3 to 12 weeks

• 10 to 20 days

The _____ is the outermost layer of the hair.

• cuticle

• medulla

The _____ gives hair the majority of its strength and elasticity.

• cortex

• shaft

Which layer of the hair is sometimes absent from the hair?

• medulla

• cuticle

The diameter of individual hair strands is referred to as hair:

• texture

• elasticity

The melanin granules found in fine hair texture are:

• grouped tightly

• grouped loosely

Coarse hair strands have _____ diameter.

• a large

• a medium

Hair with a tight cuticle that makes it difficult for chemicals and moisture to penetrate has:

• low porosity

• deep porosity

Permed, colored, chemically relaxed, and straightened hair will have what degree of porosity?

• high porosity

• average porosity

What type of melanin gives black and brown color to hair?

• eumelanin

• mixed melanin