Cosmetology Chemical Services 3

Question 1

Which law of color states that mixing equal parts of two primary colors produces a secondary color?

Accepted Answer

Law of color mixing

Answer

The law of color mixing states that combining two primary colors in equal amounts will produce a secondary color (e.g., red + yellow = orange).

Question 2

What is the developer's role in permanent haircolor chemistry?

Accepted Answer

Oxidize the color molecules and lighten the hair

Answer

The developer (hydrogen peroxide) oxidizes the color molecules so they enlarge inside the cortex and simultaneously lightens the natural melanin to allow color deposit.

Question 3

A client with level 4 natural hair wants to achieve level 8. How many levels of lift are needed?

Accepted Answer

4 levels

Answer

Going from level 4 to level 8 requires lifting the hair 4 levels, which typically requires a higher volume developer or pre-lightening.

Question 4

What is the purpose of a patch test (predisposition test) before a haircolor service?

Accepted Answer

Check for allergic reaction to the color

Answer

A patch test (also called an allergy or predisposition test) is performed 24–48 hours before a color service to detect any allergic reaction to aniline derivative dyes.

Question 5

Bleach (lightener) works by dissolving the hair's natural melanin through which process?

Accepted Answer

Oxidation

Answer

Bleach works through oxidation, where the hydrogen peroxide releases oxygen molecules that break apart (oxidize) the melanin granules in the hair's cortex.

Cosmetology Practice Test

Cosmetology Practice Test

Cosmetology Chemical Services 3