Chapter 21: Haircoloring

Front

The cortex, or middle layer of each hair, gives the hair the majority of its strength and elasticity, and contributes about _____ percent to the overall strength of the hair.

Back

80

Front

Hair texture is determined by the diameter of individual hair _____ (page 672)

Back

strands

Front

What term describes the condition when the cuticle is tight and the hair is resistant, making it difficult for moisture or chemicals to penetrate?

Back

Low porosity

Front

When the cuticle is lifted and the hair is overly porous and takes color quickly, the hair would be said to have _____ (page 672)

Back

high porosity

Front

What unit of measurement identifies the lightness or darkness of a color, or the saturation, density, or concentration of color?

Back

Level

Front

A color obtained by mixing equal parts of two primary colors is a ______.

Back

secondary color

Front

A color achieved by mixing equal parts of a secondary color and its neighboring primary color on the color wheel is a _______(page 676)

Back

tertiary color

Front

_____ haircolors, also known as vegetable haircolors, such as henna, are colors obtained from the leaves or bark of plants. (page 682)

Back

Natural

Front

What is the most commonly used developer and oxidizing agent that, when mixed with an oxidation haircolor, supplies the necessary oxygen gas to develop the color molecules and create a change in natural hair color?

Back

Hydrogen peroxide

Front

Chemical compounds that lighten hair by dispersing, dissolving, and decolorizing the natural pigment are ________ (page 684)

Back

hair lighteners