CHS Hair Coloring & Chemical Treatments 3

Question 1

Which chemical is responsible for breaking the disulfide bonds in a thio-based relaxer?

Accepted Answer

Ammonium thioglycolate

Answer

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?

Accepted Answer

The overlapping of two chemical services can cause severe breakage

Answer

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?

Accepted Answer

Re-forms broken disulfide bonds and stops the chemical action

Answer

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?

Accepted Answer

Hair that has no prior chemical treatment

Answer

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:

Accepted Answer

Pull the color through to the ends only in the last 5–10 minutes of processing

Answer

Pulling color through to mid-lengths and ends in the final minutes avoids over-processing previously colored hair while refreshing the tone.

(CHS) Certified Hair Stylist Practice Test

(CHS) Certified Hair Stylist Practice Test

CHS Hair Coloring & Chemical Treatments 3