CHS Hair Coloring & Chemical Treatments 3 — Questions and Answers
Question 1: Which chemical is responsible for breaking the disulfide bonds in a thio-based relaxer?
- Sodium hydroxide
- Ammonium thioglycolate (Correct answer)
- Hydrogen peroxide
- Sodium bromate
Correct answer: Ammonium thioglycolate
Ammonium thioglycolate (thio) breaks disulfide bonds in thio relaxers, the same active ingredient used in permanent waves.
Question 2: A client with previously chemically relaxed hair wants a permanent wave. What is the primary concern?
- The scalp may be too oily to hold the wave
- The overlapping of two chemical services can cause severe breakage (Correct answer)
- Permanent waves cannot be performed on relaxed hair under any circumstances
- The color will fade faster after the perm
Correct answer: The overlapping of two chemical services can cause severe breakage
Applying a perm over relaxed hair (double-process) can cause extreme hair damage, breakage, or complete hair loss due to over-processing the disulfide bonds.
Question 3: During a sodium hydroxide relaxer service, what does the neutralizing shampoo do?
- Removes the lye from the hair
- Re-forms broken disulfide bonds and stops the chemical action (Correct answer)
- Opens the cuticle to allow deeper penetration
- Deposits color to refresh the tone
Correct answer: Re-forms broken disulfide bonds and stops the chemical action
Neutralizing shampoo stops the chemical process and re-bonds sulfur bonds broken during relaxing, stabilizing the hair's new straight configuration.
Question 4: What is 'virgin hair' in the context of a chemical color service?
- Hair that has never been cut
- Hair that has no prior chemical treatment (Correct answer)
- Hair treated only with semi-permanent color
- Hair that has been chemically relaxed
Correct answer: Hair that has no prior chemical treatment
Virgin hair refers to hair that has never been chemically processed, making it the most predictable for coloring outcomes.
Question 5: When applying a single-process color to regrowth, you should apply color to the new growth first and then:
- Rinse and reapply to mid-lengths and ends simultaneously
- Pull the color through to the ends only in the last 5–10 minutes of processing (Correct answer)
- Apply a fresh mixture to mid-lengths and ends from the beginning
- Leave the ends uncolored to avoid over-processing
Correct answer: Pull the color through to the ends only in the last 5–10 minutes of processing
Pulling color through to mid-lengths and ends in the final minutes avoids over-processing previously colored hair while refreshing the tone.
Question 6: Which of the following best describes the purpose of a strand test before a color service?
- To determine the client's scalp sensitivity to chemicals
- To predict the processing time and final color result on the client's actual hair (Correct answer)
- To check the hair's porosity level only
- To test for metallic salt deposits in the hair
Correct answer: To predict the processing time and final color result on the client's actual hair
A strand test reveals how the specific client's hair will respond to the color formula, predicting the final result and processing time.
Question 7: High-lift color requires which specific developer volume to achieve maximum lift within one step?
- 20 volume
- 30 volume
- 40 volume (Correct answer)
- 50 volume
Correct answer: 40 volume
High-lift tints are specifically formulated to be used with 40-volume developer to achieve the maximum lift possible in a single-process color service.
CHS Hair Coloring & Chemical Treatments 3
Which chemical is responsible for breaking the disulfide bonds in a thio-based relaxer?