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The chemical solution used in the perming process is determined by the client's hair type and the pH of the solution. Classic alkaline perms are used for stronger, coarser hair. They work at room temperature and usually contain ammonium thioglycolate in the pH range of 9-10. Acid perms are used on more delicate or thinner hair.
The thioglycolic acid in the perm solution reduces the disulfide cystine bonds in the cortex of the hair. [2] In a sense, the thioglycolate removes crosslinks. After washing, the hair is treated with a mild solution of hydrogen peroxide , which oxidizes the cysteines back to cystine .
Another type of "no-lye" relaxer uses ammonium thioglycolate, which is also known as perm salt for its use in permanent waves. Perm salt is a chemical reducing agent which selectively weakens the hair's cystine bonds instead of disrupting the entire protein, but strips out the natural oils even more thoroughly than the alkali hydroxide products.
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A chemical depilatory is a cosmetic preparation used to remove hair from the skin.Common active ingredients are salts of thioglycolic acid and thiolactic acids.These compounds break the disulfide bonds in keratin and also hydrolyze the hair so that it is easily removed.
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This new style of perming lashes creates more of a natural shape and curve. The original way of perming lashes, still used today, gives a less natural curve or shape to the lash. Another way to perm lashes is by using a plastic instrument that looks a lot like an eyelash curler. This plastic instrument is then placed at the base of your lashes ...
Dread perms usually cost in the range of $300–$400 at a salon, and although pricey, often prove to be the easiest and most professional way of creating dreadlocks. Another option is to buy a home-perm kit, as these will only cost $10–$20, with a similar, if not better result.
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