Question: What length of hair was Charles Nessler’s heat permanent waving machine suitable for?

Answer: Long hair

Question: All of the following statements describe ammonium thioglycolate relaxers EXCEPT:

Answer: do not require base cream to be applied to the scalp

Question: If the base is longer than the perm rod, the result will be:

Answer: uneven curl

Question: What was the active ingredient used in the first cold wave?

Answer: thioglycolate acid

Question: What perms cause minimal swelling and must be wrapped with firm, even tension?

Answer: acid

Question: In 1926, the croquignole method of wrapping hair from the ends to the scalp was created. What is another name for this wrapping method?

Answer: overlap method

Question: What is used to protect the scalp and hairline from chemicals?

Answer: base cream

Question: Relaxer strengths for ammonium thioglycolate are categorized as all of the following types EXCEPT:

Answer: mild

Question: Which relaxer ingredient requires the use of a base cream on the scalp to prevent irritation?

Answer: sodium hydroxide

Question: Which base control is the most commonly used during a perm service?

Answer: half-off base