Question

Before permanent wave service, what is one of the reasons cosmetologists perform test curls?

A) to check for adverse reactions to the perm solution
B) to confirm the presence of metallic salts
C) to determine if a different rod size is needed
D) to verify whether the hair has been bleached

Answer 1

Test curls are performed before a permanent wave service to determine if a different rod size is needed to achieve the desired curl pattern. It allows the stylist to make necessary adjustments based on the hair's reaction to the perm solution and rod size. Test curls help in obtaining the perfect outcome for both perms and chemical straightening, which alters the hair's disulfide bonds.

Step-by-step explanation:

Before a permanent wave service, cosmetologists perform test curls primarily to determine if a different rod size is needed. This step is crucial because it allows the stylist to evaluate how the client's hair reacts to the perm solution and to the size of the rod being used. The goal is to achieve the desired curl pattern and size, making adjustments as necessary based on the test curl results. Test curls are not typically used to check for adverse reactions, confirm the presence of metallic salts, or verify whether the hair has been bleached, though other testing methods may be used for these purposes.

Perms and chemical straightening work through a process that affects the disulfide bonds within the hair strands. Temporary and permanent waves are created when these disulfide bonds are broken and then reformed into a new shape around the rods. The test curl helps ensure that the desired outcome is achievable with the selected rod size and perm solution.