Share Milady ch 20 chemical texture services
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Glycerol monothioglycolate is the active ingredient in what type of waving lotion?
True acid and acid balancing
Sodium hydroxide is the active ingredient in what type of perm?
Alkaline perm
What type of hair is easily penetrated by the waving lotion?
Porous
Course hair with a strong resistant cuticle layer needs the additional swelling and penetration that come from what type of perm?
Highly alkaline perm
Waving lotion breaks the desulfide bonds through this.
Chemical reaction called reduction
What type of perm solution works by softening and expanding the hair?
Alkaline perm solution
A disulfide bond forms when a sulfur when two adjacent chains do what?
Join together
Keratin proteins are made of long what?
Chains of amino acids linked together end to end like beads
Polypeptide chains are long chains of what?
Amino acids joined together by peptide bonds
Polypeptide chains are peptide bonds formed by amino acids that join what?
Chemical bonds
Neutralizer rebuilds disulfide bonds broken by what?
Waving lotion
If hair is under processed, further processing will make the hair
Curlier
If to many disulfide bonds are broken in the perming process, what happens to the hair?
The hair will be to weak to hold a firm curl.
A properly processed permanent wave should break and rebuild approximately what % of the hairs disulfide bonds?
50
When does most of the processing take place when the solution penetrates the hair, within the first?
5-10 min
How do we determine processing time of a perm?
Strength of solution
