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Which of the following perm types is processed without a heat source?

A) endothermic waves
B) alkaline waves
C) exothermic waves
D) true acid waves

1 Answer

2 votes

Final answer:

Alkaline waves are the type of perm that is processed without a heat source. They use ammonium thioglycolate as the reducing agent to break and reform disulfide bonds in the hair, giving it a curl or wave pattern.

Step-by-step explanation:

Out of the given options, the type of perm that is processed without a heat source is option B) alkaline waves. Alkaline waves use ammonium thioglycolate as the reducing agent, which breaks disulfide bonds in the hair and reforms them into a new shape, giving the hair a curl or wave pattern. This process does not require heat to activate the chemical reaction.

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