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“Of the common cosmetic procedures, permanent waving, bleaching and dyeing all damage the hair to some extent. Permanent waving, by its nature, disrupts the structure of the hair: indeed, it has to do so for the perm to be successful. In order to change the shape of the hair, permanent waving agents first break the disulphide bonds that give the hair shaft its structure. The hair is then put into its new shape and ‘neutralised’. Neutralisation is the name given to the re-forming of the chemical bonds in their new positions, a process that fixes the hair permanently into its new shape. The secrets of satisfactory perming lie in the manufacturer’s formulation of the product and the stylist’s expertise in applying the neutralising lotion after just the right length of time, so that the perm is fixed but the hair is damaged as little as possible. Permed hair should always look beautiful in spite of this deliberate ‘damage’.” (part of the on-line reference by Dr. John Gray for the P&G Hair Care Research Center. Click here for the rest of the article along with the entire online reference)
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