This is the outer layer of hair

This is the system that colorist use to determine the lightness or darkness of a color

These are the primary colors

This measures the concentration and strength of peroxide

Another name for patch test

This is sometimes not present

This is the saturation, density, or concentration of a color

This is the predominant tone of a color

Oxidizing agents that have a pH of 2.5 to 4.5

Non-ammonia color that adds shine

Clients have their haircolored this often

This is the first step in the color consultation service

A property of objects that depend on the light they reflect

Pale colors used on prelightened hair

This determines how the hair will react to haircolor

This gives the hair the majority of its strength and elasticity

This lends black and brown to the hair

The strength of a color

The varying degree of warmth exposed during lightening

Visible line separating color from new growth

This is grouped more tightly in fine hair

This gives blonde and red to the hair

Tones that reflect more light and can seem lighter

The process where oxygen is released within the cortex

Clients who are 80 to 100 percent gray should stay is this range for the most flattering look