Final answer:
When applying the perm solution on the rods, you should start at the root area of the hair to ensure even saturation and a uniform curl pattern.
Step-by-step explanation:
When applying the perm solution on the rods, you should start at the root area of the hair. This is where the hair is closest to the scalp. Starting at the root ensures that the perm solution evenly saturates the hair and creates a uniform curl pattern.
Once you have applied the perm solution at the roots, you can then proceed to apply it along the length of the rods, making sure to fully saturate the hair.
Starting at the root is important because it allows the perm solution to penetrate the hair shaft and break down the protein bonds, which are responsible for the hair's natural structure. By breaking these bonds, the hair can be reshaped and styled into a permanent curl or wave.