Final answer:
Low/no thio perms are used for a gentler perming method, ideal for individuals with delicate, damaged, or fine hair, offering softer and more natural curls compared to traditional perms.
Step-by-step explanation:
Low/no thio perms are a type of hair perming method that are used when one desires a less harsh chemical treatment than traditional perms. This gentler option is particularly suitable for individuals with delicate, damaged, or fine hair that might be overly susceptible to the stronger chemicals traditionally used in perms. The chemicals in low/no thio perm solutions have a lower concentration of ammonium thioglycolate, or may not contain it at all, which reduces the potential for hair damage and irritation.
Using low/no thio perms helps to create softer, more natural-looking waves or curls compared to the tight curls often associated with traditional perms. Hairstylists may recommend low/no thio perms for clients looking for a more subtle change, for those who have previously experienced damage from stronger perm solutions, or for those who are concerned about the health of their hair.