All hair coloring products require a patch test with the exception of:

Coloring products that have a coating action on the hair and are removed by shampooing are:

The most commonly used developer in hair color is:

Nonammonia color that adds shine and tone to the hair

Colors obtained from the leaves or bark of plants

Chemical compounds that lighten hair by dispersing, dissolving, and decolorizing the natural pigment are:

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.