Cosmetology Chemical Services 2 — Questions and Answers
Question 1: What volume developer is most commonly used for a standard permanent haircolor application?
- 10 volume
- 20 volume (Correct answer)
- 40 volume
- 30 volume
Correct answer: 20 volume
20 volume (6% hydrogen peroxide) developer is the standard strength used for permanent haircolor to provide one to two levels of lift.
Question 2: A thio-free (acid-balanced) perm uses which active ingredient?
- Ammonium thioglycolate
- Glyceryl monothioglycolate (Correct answer)
- Sodium bisulfite
- Cysteine
Correct answer: Glyceryl monothioglycolate
Acid-balanced perms use glyceryl monothioglycolate as the active ingredient and require heat to process, making them gentler and better for color-treated hair.
Question 3: What is the primary purpose of performing a strand test before a chemical service?
- Check for allergic reactions
- Predict the processing time and results (Correct answer)
- Assess scalp health
- Determine hair density
Correct answer: Predict the processing time and results
A strand test is performed to predict how the hair will react to the chemical service, helping determine processing time, color result, or potential damage.
Question 4: Hair that is overly porous and has been previously lightened is considered:
- Resistant hair
- Normal porosity hair
- Damaged, high-porosity hair (Correct answer)
- Low porosity hair
Correct answer: Damaged, high-porosity hair
Heavily lightened hair becomes damaged with a raised cuticle, making it highly porous and prone to absorbing chemicals too quickly and unevenly.
Question 5: When relaxing previously relaxed hair (a retouch), the chemical is applied only to the:
- Entire hair shaft
- Previously relaxed ends
- New growth only (Correct answer)
- Mid-strand and ends
Correct answer: New growth only
During a relaxer retouch, the product is applied only to the new, unprocessed growth to avoid over-processing the previously relaxed hair.
Question 6: What natural pigment gives hair its red and yellow tones, revealed during lightening?
- Eumelanin
- Phaeomelanin (Correct answer)
- Melanocyte
- Keratin
Correct answer: Phaeomelanin
Phaeomelanin is the warm pigment (red, orange, yellow) that becomes visible as eumelanin (dark/cool pigment) is lifted during the lightening process.
Cosmetology Chemical Services 2
What volume developer is most commonly used for a standard permanent haircolor application?