Final answer:
The permanent waving method is used to produce a uniform curl from the scalp to ends, involving the application of chemicals and wrapping hair around rods. Temporary waves can be achieved by wetting hair to disrupt hydrogen bonds, but these are not long-lasting.
Step-by-step explanation:
The wrapping method used to produce a uniform curl from the scalp to ends is known as a permanent waving or perm. During this process, chemicals are applied to the hair, which is then wrapped around forms or rods. It is crucial to employ even tension and distribute the hair evenly to achieve a consistent curl pattern throughout the hair length. The hair is then subjected to a chemical reaction, which can vary to achieve different types of curls.
For a temporary wave, the process involves the hair getting wet, allowing water molecules to disrupt some of the hydrogen bonds in the keratin strands. As the hair dries and new hydrogen bonds are formed, the hair is able to retain the desired curl shape for a short period. Unlike the permanent wave, the temporary wave is not long-lasting and will revert back to its original shape after the hair gets wet again.