What is potassium/lithium hydroxide primarily used for?

Potassium and lithium hydroxide are primarily used as strong alkaline ingredients in chemical relaxers. These compounds work by breaking down the disulfide bonds in the hair's protein structure, enabling the hair to be straightened or relaxed. Chemical relaxers are designed for people with curly or wavy hair who desire a smoother, straighter look. The alkalinity of potassium and lithium hydroxide allows for effective penetration into the hair shaft, facilitating the restructuring process required for relaxing curls.

Other choices do not accurately represent the primary function of these hydroxides; they are not used for enhancing hair color, conditioning, or promoting hair growth. Each of those applications involves other specialized ingredients or techniques, making it clear that the role of potassium and lithium hydroxide is specifically aligned with chemical relaxation processes.