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
What volume developer is most commonly used for a standard permanent haircolor application?
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.
A thio-free (acid-balanced) perm uses which active ingredient?
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.
What is the primary purpose of performing a strand test before a chemical service?
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.
Hair that is overly porous and has been previously lightened is considered:
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.
When relaxing previously relaxed hair (a retouch), the chemical is applied only to the:
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.
What natural pigment gives hair its red and yellow tones, revealed during lightening?
Answer: Phaeomelanin
Phaeomelanin is the warm pigment (red, orange, yellow) that becomes visible as eumelanin (dark/cool pigment) is lifted during the lightening process.