Free Cosmetology practice test
Free Cosmetology Practice Test: Haircoloring (2026)
20 questions on Haircoloring, drawn from the written (theory) state board syllabus. Answer them all, then check your score. No account and no card.
Questions 1 to 20
Choose an answer before you open the explanation. Guessing first is what makes the explanation stick.
Haircoloring Question 1 of 20
On the 1–10 hair-color level system, what do level 1 and level 10 represent?
Check answer
Correct answerB. 1 = black (darkest), 10 = lightest blonde
Why this is correct: The LEVEL system measures lightness/darkness: 1 = black (darkest) up to 10 = lightest blonde. It tells the stylist how many levels to lift or deposit.
Haircoloring Question 2 of 20
What is 20-volume (6%) developer commonly used for in haircoloring?
Check answer
Correct answerB. About 1–2 levels of lift and standard gray coverage
Why this is correct: Developer is hydrogen peroxide; 20-volume (6%) is the common strength for ~1–2 levels of lift and gray coverage. Higher volumes (30/40) lift more levels.
Haircoloring Question 3 of 20
To make resistant hair accept color evenly before tinting, the cosmetologist should:
Check answer
Correct answerA. Presoften the resistant hair as directed (or use a filler on porous hair)
Why this is correct: Presoftening opens the resistant cuticle so color takes; a filler evens porosity. Bleaching is not the general prep step.
Haircoloring Question 4 of 20
Using excessive hydrogen peroxide (lightener) on the hair tends to make it:
Check answer
Correct answerC. More porous
Why this is correct: Over-lightening damages the cuticle and cortex, increasing porosity.
Haircoloring Question 5 of 20
During a color retouch, the tint should be applied to:
Check answer
Correct answerA. Only the new growth, up to the previously colored hair
Why this is correct: Apply only to new growth to avoid overlap (banding, breakage, uneven color).
Haircoloring Question 6 of 20
When applying lightener (bleach), hair should be worked in subsections that are:
Check answer
Correct answerA. About 1/8 inch, following the manufacturer
Why this is correct: Thin subsections ensure full saturation and even lift; always follow product directions.
Haircoloring Question 7 of 20
An aniline tint with a pH of 9.5 is considered:
Check answer
Correct answerA. Alkaline
Why this is correct: On the pH scale 7 is neutral; above 7 is alkaline. A pH of 9.5 is alkaline (only pure water at pH 7 is neutral).
Haircoloring Question 8 of 20
Before applying an aniline-derivative haircolor, the required patch (allergy) test is left undisturbed for about:
Check answer
Correct answerA. 24 – 48 hours (or per directions)
Why this is correct: Aniline (PPD) color requires a 24–48 hour patch test before each application to detect allergy; follow the manufacturer.
Haircoloring Question 9 of 20
When an aniline-derivative color is mixed with hydrogen peroxide (Hâ‚‚Oâ‚‚), the chemical reaction is called:
Check answer
Correct answerA. Oxidation
Why this is correct: Peroxide oxidizes the dye precursors so they develop and lodge in the cortex — this is oxidation (permanent color).
Haircoloring Question 10 of 20
For extremely resistant hair, before tinting you should first:
Check answer
Correct answerA. Presoften the hair per the manufacturer's directions
Why this is correct: Resistant/gray hair needs presoftening to open the cuticle; a vague 'slight bleach' is not the standard step.
Haircoloring Question 11 of 20
When rinsing freshly lightened hair, using cool/lukewarm water (per directions) mainly helps to:
Check answer
Correct answerA. Remove the product and reduce scalp irritation
Why this is correct: Thorough rinsing removes all lightener from hair/scalp; cool/lukewarm water is gentler on the scalp — follow the product.
Haircoloring Question 12 of 20
When lightening, product is applied first to the darkest/most resistant area because that area:
Check answer
Correct answerA. Needs the most time to lift (lighten)
Why this is correct: The darkest/most resistant area needs the longest processing, so it is applied first to lift evenly with the rest.
Haircoloring Question 13 of 20
Underdeveloped color on predominantly gray hair usually appears as:
Check answer
Correct answerA. Poor, too-light gray coverage
Why this is correct: Too little development time gives weak, too-light coverage with gray still showing; full timing covers gray evenly.
Haircoloring Question 14 of 20
Hair that is hard to lift to a pale yellow stage most likely contains:
Check answer
Correct answerA. Red/orange (warm) pigment
Why this is correct: Red/orange underlying pigment is the last to break down during lifting, making such hair hard to reach pale yellow.
Haircoloring Question 15 of 20
Applying a blue-base toner to hair pre-lightened to pale yellow can produce a:
Check answer
Correct answerA. Green cast
Why this is correct: Blue + yellow = green on the color wheel. To cancel yellow use violet (its opposite), not blue.
Haircoloring Question 16 of 20
To reach a red-brown result using a blue-base toner, at which lightening stage should you stop bleaching?
Check answer
Correct answerA. The orange stage
Why this is correct: Stopping at the orange stage keeps warmth so the toner yields a warm red-brown result.
Haircoloring Question 17 of 20
If pre-lightened hair has an unwanted GREEN cast, which color is added to neutralize it?
Check answer
Correct answerA. Red
Why this is correct: Red is opposite green on the color wheel, so red neutralizes an unwanted green cast.
Haircoloring Question 18 of 20
An aniline-derivative tint mixed with hydrogen peroxide (developer) causes a chemical reaction called:
Check answer
Correct answerC. Oxidation
Why this is correct: Permanent (oxidative) color works when the tint OXIDIZES with the developer to form color molecules inside the hair.
Haircoloring Question 19 of 20
Cool tones (blue, green, violet) are added to a haircolor formula in order to:
Check answer
Correct answerB. Reduce/neutralize warmth, making it more drab
Why this is correct: On the color wheel, cool tones oppose warm tones, so adding cool tones NEUTRALIZES warmth for a drab/muted result.
Haircoloring Question 20 of 20
On the color wheel, to neutralize an unwanted RED tone in hair, use its opposite:
Check answer
Correct answerA. Green
Why this is correct: Red opposes green on the wheel → green neutralizes red. Likewise: violet cancels yellow, blue cancels orange.
Practice content notice: These are original study questions, not recalled or official exam items. Exam providers, timing, passing scores, and state-law coverage can change; verify current requirements with your licensing board.