CHS Chemical Services & Safety 2

Question 1

Which chemical in permanent wave solutions breaks the disulfide bonds in hair?

Accepted Answer

Ammonium thioglycolate

Answer

Ammonium thioglycolate is the reducing agent in acid and alkaline waves that breaks disulfide bonds so hair can be reshaped.

Question 2

What is the recommended PPE when applying a chemical relaxer to a client's scalp?

Accepted Answer

Gloves and protective apron

Answer

Gloves and a protective apron protect both the stylist's skin and clothing from caustic relaxer chemicals.

Question 3

A client develops redness and itching immediately after a relaxer application. What is the FIRST action?

Accepted Answer

Rinse the relaxer off immediately

Answer

Immediate rinsing removes the caustic chemical and reduces further scalp irritation or chemical burns.

Question 4

In the context of chemical relaxers, what does 'lanthionization' refer to?

Accepted Answer

The permanent breaking and re-forming of hair bonds with a sulfur link

Answer

Lanthionization is the irreversible process where sodium hydroxide converts disulfide bonds into lanthionine bonds, permanently straightening hair.

Question 5

Which factor most affects how quickly a chemical relaxer processes?

Accepted Answer

Scalp and room temperature

Answer

Higher temperatures accelerate the chemical reaction, so scalp heat and ambient temperature significantly impact relaxer processing time.

(CHS) Certified Hair Stylist Practice Test