What is an important factor when consulting with a client before a perm?

Discussing a client's previous chemical treatments is crucial during a consultation for a perm, as it informs the stylist about the hair's condition and its ability to withstand additional chemical processes. Previous treatments, such as coloring, relaxing, or other perms, can significantly affect the integrity, texture, and overall health of the hair. Knowing this information can help the stylist make informed decisions about the perm technique, the strength of the chemicals used, and any necessary precautions to avoid damage. Additionally, it can guide the stylist in selecting appropriate aftercare and maintenance to ensure the best results and sustain the health of the client's hair.