Natural, vegetable, and metallic hair colors are also known as:

Process by which oxygen is released

Dye precursors that combine with hydrogen peroxide to form larger, permanent dye molecules are called:

A presoftener acts like a stain to the hair.

Hair coloring products that are used primarily on prelightened hair to achieve pale and delicate colors are:

Demipermanent colors are also known as:

Pheomelanin is the melanin that gives blond and red colors hair.

Hair that looks gun-metal gray is ready to receive color.

Overlapping hair color on previously tinted hair can cause breakage and create a visible line of:

Viscosity measures the concentration and strength of hydrogen peroxide.