Final answer:
Mixing an oxidizer with permanent waving solution results in a chemical reaction that disrupts and reforms disulfide bonds, allowing hair to be permanently reshaped.
Step-by-step explanation:
When creating exothermic waves, mixing an oxidizer with permanent waving solution causes a chemical reaction that involves the disruption and reformation of disulfide bonds in hair strands. The permanent waving solution contains a reducing agent that initially disrupts the disulfide bonds, allowing the hair to be shaped around rollers or curlers. Once the hair is in the desired shape, an oxidizing agent, such as hydrogen peroxide, is added. This neutralizer then reforms the disulfide bonds in their new positions, ensuring that the permanent wave holds until the hair grows out.