Before performing a coloring service with an aniline derivative product, the client must have a(n) ___.

The standard volume of hydrogen peroxide used to achieve most results with permanent haircolor is ___.

Clients who have their hair colored usually visit the salon every ___ weeks.

___ is described as a property of objects that depends on the light they reflect and is perceived (by the human eye) as red, yellow, blue, or other shades.

All haircoloring products require a patch test, with the exception of ___.

What is one of the most valuable tools for identifying the natural level in the hair?

Powdered persulfate salts added to haircolor to increase its lightening ability are ___.

Neutral base colors are often used to ___.

When applying color using the brush-and-bowl method, the mixing bowl should be ___.

Non-oxidative haircolor is classified as temporary and ___ (traditional).

Lighteners that have a thicker consistency and give more control during scalp application are known as ___.

Tones can be described as cool, warm, or ___.

To test for porosity, take several strands from four different areas of the head: the front hairline, the temple, the crown, and the ___.