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NVQ LEVEL 2 HAIRDRESSING by sdfwerte

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									NVQ LEVEL 2 HAIRDRESSING

      UNIT H12 PERMING
ACID AND ALKALINE

• THE pH SCALE
The pH scale
UNIT H12 PERMING
Acid perms
• The main active ingredient in and acid perm
  is glycerol monothioglycolate which
  effectively reduces the pH.
• This lower pH is gentler on the hair and
  typically gives a softer curl than alkaline
  perms.
Unit H12 - Perming
Acid perms
• Acid perms have a pH • Heat is produced in
  range of approx 4.5 -     one of two ways
  6.0 and usually         • The perm is activated by
  penetrate the hair more   heat created chemically
  slowly.                   within the product. This is
                            called exothermic.
• they require a longer
                          • .The perm is activated by
  processing time and       an outside source, i.e. a
  heat to develop curl. :
                                clymazone.

                            •    This is called
                                endothermic
NVQ level 2 Hairdressing

                • The benefits of Acid
                  perms are:
                • Softer curl patterns
                • Slower, more
                  controllable
                  processing time
                • Gentler treatment for
                  delicate hair types
NVQ Level 2 Hairdressing

Generally Acid perms
  are used for
• Perming
  delicate/fragile or
  colour treated hair
• Soft, natural curl or
  wave patterns
• Style support, rather
  than strong curl
NVQ Level 2 Hairdressing
Alkaline Perms
• The main ingredient or    • The alkaline lotion
  reducing agent in           makes the cuticle
  alkaline perms is           layers swell slightly
  ammonium                    and open allowing the
  thioglycolate.              solution to penetrate
• The pH of alkaline          more quickly than acid
  lotions generally falls     balanced lotions.
  within the range of 8.0
  - 9.5
NVQ Level 2 Hairdressing

               • The benefits of
                 Alkaline perms are:
               • Strong curl patterns
               • Fast processing time
               • Room temperature
                 processing
NVQ Level 2 Hairdressing

• Generally Alkaline
  perms are used:
• For perming resistant
  hai
• When a strong/tight
  curl is desire
• The client has a
  history of early curl
  relaxation
Unit H12 Perming

• What is the importance of acurate timing
  during neutralising?
• To allow time for sufficient sulphur
  /disulphide bonds to form
• Why is it important to rinse the neutraliser
  correctly out of the hair?
• To prevent overprocessing and to ensure all
  products are removed
Unit H12 Perming

•   Types of conditioners used during perming
•   Preperm
•   To even out the porosity
•   Post perm – Herbal anti-oxy
•   Used to restore pH
•   Close cuticle
•   And replace lost moisture
Types of winding pattern

                    Brick
9 section           wind
perm



Stack
perm
              Directional
              perm

								
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