Chemical Services & Safety Flashcards
7 cards from real CHS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Chemical Services & Safety flashcards as text
When mixing powder bleach with developer, which safety practice is most important?
Answer: Mix in a well-ventilated area and avoid inhaling dust
Bleach powder can release irritating dust particles and fumes, so adequate ventilation protects both the stylist and client from respiratory irritation.
What is 'trichorrhexis nodosa' and which chemical service most commonly causes it?
Answer: Brittle swellings along the hair shaft caused by over-processing from chemical relaxers or perms
Trichorrhexis nodosa appears as white nodes on the shaft where the cuticle has been destroyed, often caused by over-processing during chemical relaxing or perming.
Which of the following is a TRUE contraindication for performing a chemical service?
Answer: Client has a known allergy to PPD (paraphenylenediamine)
A known PPD allergy is a direct contraindication for oxidative hair color services because PPD is the most common allergenic ingredient in permanent dye.
If hydrogen peroxide contacts a client's eye during a color service, what is the immediate first aid step?
Answer: Flush the eye with cool water for at least 15 minutes
Flushing with water for at least 15 minutes dilutes and removes the peroxide from the eye and is the standard first aid for chemical eye exposure.
A stylist accidentally mixes an ammonia-based hair color with a sodium hypochlorite (bleach) cleaning product. What is the immediate hazard?
Answer: Release of toxic chloramine gas
Ammonia reacts with sodium hypochlorite to produce chloramine vapors, which are toxic and can cause serious respiratory damage.
What does SDS (Safety Data Sheet) Section 4 specifically address?
Answer: First-aid measures in case of exposure
Section 4 of the standardized 16-section SDS format always contains first-aid measures for inhalation, skin contact, eye contact, and ingestion.
Which chemical service requires the hair to be completely dry before application to prevent dilution of the formula?
Answer: Sodium hydroxide (lye) relaxer
Sodium hydroxide relaxers must be applied to dry hair because water dilutes the lye concentration and reduces processing effectiveness and predictability.