Final answer:
During a curl reformation service, waving lotion is applied to ensure thorough saturation, which breaks down the disulfide bonds in hair keratin to form permanent waves.
Step-by-step explanation:
Once the hair is completely wrapped during a curl reformation service, waving lotion, which is a chemical solution, is applied to ensure thorough saturation. This lotion helps in breaking down the hair's structure, specifically the disulfide bonds within the keratin of the hair strands. The saturation allows the hair to take on a new shape, as the bonds are disrupted and then reformed when the hair dries and sets into its new shape, in this case, curls. The reformation of these bonds is what creates permanent waves or curls.