What type of hair requires caution when using an alkaline perm?

Fine, delicate hair requires caution when using an alkaline perm because it is more susceptible to damage from the stronger chemicals used in alkaline perms. Alkaline perms typically have a higher pH level, which breaks down the hair's cuticle and cortex more aggressively to allow the perm solution to penetrate. Fine hair, being naturally more fragile, may not withstand the intensity of these chemicals, leading to over-processing, breakage, or excessive dryness.

It's essential for cosmetologists to assess the hair's condition and texture before choosing a perm type to ensure the integrity of the hair is maintained while achieving the desired curl. In contrast, other types of hair, such as coarser or already relaxed hair, might handle alkaline perms better due to their stronger structure or existing treatment. Color-treated hair also deserves attention, but the primary concern with alkaline perms lies in the delicate nature of fine hair.