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During permanent waving, most of the processing takes place within:

  1. 2 to 5 mins

  2. 5 to 10 mins

  3. 10 to 15 mins

  4. 15 to 20 mins

The correct answer is: 5 to 10 mins

During permanent waving, the processing time refers to the amount of time the chemical solution is left on the hair to achieve the desired curl pattern. The processing time for permanent waving varies depending on factors such as hair type, length, and the strength of the chemical solution used. Typically, the processing time ranges from 5 to 10 minutes. Options A, C and D are incorrect because they do not fall within the typical processing time for permanent waving. Choosing these options may result in either under or overprocessed hair, leading to unsatisfactory results. It is important to follow the recommended processing time to achieve the best outcome for your hair.