Question

What is the procedure criteria for a permanent waving service?

Answer 1

A permanent waving service involves the use of a reducing substance to break the disulfide bonds in the hair and reform it into a desired curl pattern that lasts for several months. The procedure includes washing, sectioning, wrapping, applying the reducing substance, processing, rinsing, neutralizing, and drying the hair.

Step-by-step explanation:

A permanent waving service, also known as a perm, is a hairstyle consisting of styles set into the hair that lasts for several months. The procedure criteria for a permanent waving service involves the use of a basic reducing substance, usually ammonium thioglycolate, to reduce and rupture the disulfide cross-links in the hair. This disrupts the disulfide bonds, allowing the hair to be reformed into the desired curl pattern.

The steps in a permanent waving service include:

1. Washing and sectioning the hair.
2. Applying a protective cream or lotion to the scalp and hairline.
3. Wrapping the hair around rods or curlers.
4. Applying the reducing substance to break the disulfide bonds.
5. Allowing the solution to process for a specific amount of time.
6. Rinsing the hair to remove the reducing substance.
7. Neutralizing the hair with an acid-based solution to reform the disulfide bonds and lock in the new curl pattern.
8. Rinsing and conditioning the hair.
9. Drying and styling the hair.