If a client has thin hair and wants a perm with tight curls, what type of rod should you use?

Using a small rod for perming thin hair is appropriate when the client desires tight curls. Small rods create tighter, more defined curls than larger or medium rods, which produce looser waves or curls. Thin hair can often lack volume, and employing a small rod can add both curl definition and body, enhancing the overall appearance of the hair. The small size of the rod ensures that the hair wraps closely around it, allowing the perm solution to penetrate effectively and set the curl pattern in place.

While larger and medium rods would yield larger, softer curls, they would not achieve the tight, structured look the client is seeking. Flexible rods can be used for varied styles but may not provide the consistency in curl tightness that a small rod would offer. Therefore, the choice of a small rod aligns perfectly with the client's request for tight curls in thin hair, ensuring the desired result is achieved.