These perms usually will cost more than cold perms. Gives a curlier look when dry than with other perms, and appears to recondition the hair better than other perms. Digital or Hot PermĪfter the perm solution is applied, hair is wrapped in hot rods with their temperature monitored digitally. A weaker alkaline solution is then applied. Dual-action Permīest on black and gray hair, this softens and smooths the hair before winding the hair on the perm rods. Useful for using on already tinted hair and hair resistant to other perm chemicals. It works by opening the cuticle layers of the hair shaft. Acid perm Exothermic PermĪn acidic or alkaline perm that heats up from the chemical reaction of the mixed perm lotion.
Glyceryl monothioglycolate needs heat in order to be activated, and it takes longer for the hair to set. It’s better for hair that’s been permed or colored before, and for people who will be outdoors in hotter climates a lot. Hair is permed with a lotion that has a pH balance of 4.5–7, which is close to the hair’s natural pH and gentler on hair, but some people are allergic to the lotion. They don’t need heat so are also known as cold perms. The perm lotion has a pH of 8.2–9.6, and the ammonium thioglyocolate in it can damage thinner types of hair.
Expect to pay about $60–$150 for your perm, with higher prices for long hair.
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