Final answer:
When using an acid perm with heat and firm tension, the hair will have tight, springy curls.
Step-by-step explanation:
When using an acid perm and applying heat with firm, even tension, the result is tight, springy curls.
An acid perm is a type of chemical perm that uses a weak acid solution to break and reshape the disulfide bonds in the hair strands. By applying heat and wrapping the hair tightly with firm tension, the disulfide bonds are reformed in a way that creates tightly curled hair.
For example, if a person with straight hair gets an acid perm and applies heat with firm, even tension, their hair will likely have tight, springy curls as a result.