Chemical Services Flashcards
6 cards from real Cosmetology practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Chemical Services flashcards as text
Which law of color states that mixing equal parts of two primary colors produces a secondary color?
Answer: Law of color mixing
The law of color mixing states that combining two primary colors in equal amounts will produce a secondary color (e.g., red + yellow = orange).
What is the developer's role in permanent haircolor chemistry?
Answer: Oxidize the color molecules and lighten the hair
The developer (hydrogen peroxide) oxidizes the color molecules so they enlarge inside the cortex and simultaneously lightens the natural melanin to allow color deposit.
A client with level 4 natural hair wants to achieve level 8. How many levels of lift are needed?
Answer: 4 levels
Going from level 4 to level 8 requires lifting the hair 4 levels, which typically requires a higher volume developer or pre-lightening.
What is the purpose of a patch test (predisposition test) before a haircolor service?
Answer: Check for allergic reaction to the color
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.
Bleach (lightener) works by dissolving the hair's natural melanin through which process?
Answer: Oxidation
Bleach works through oxidation, where the hydrogen peroxide releases oxygen molecules that break apart (oxidize) the melanin granules in the hair's cortex.
Which perm rod size produces the tightest, smallest curl?
Answer: Small rod
Small (narrow diameter) perm rods produce tight, small curls because the hair wraps more times around the rod, creating a tighter coil.