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Introduction to perming
Transcript of Introduction to perming
Health and Safety
What do you need
Research product selection
STRUCTURE OF THE HAIR
HAS 3 STAGES:
Consider Health and Safety issues
Points to consider during consultation
Identify tests prior to perming service
Explore product choice and why?
Identify the action of perm lotion and neutraliser on the structure of the hair
Identify points to consider before perming the hair?
PRE PERM LOTION
POST PERM TREATMENT
The hair shaft
The structure of keratin
When perm lotion is put onto the hair, it opens the cuticle layer and makes the hair swell slightly.
Heat is used with some perm lotions to assist this part of the process.
It is important to read the manufacturer’s instructions each and every time you carry out a perm.
Perm lotion opens and swells the cuticle scales
The softening stage
Once the cuticle scales have opened, the perm lotion goes through into the cortex.
Hydrogen from the perm lotion links up with the disulphide bonds, breaking them apart.
(Note: not all the disulphide bonds are broken.)
The softened hair is now malleable and able to take on the shape of the perm rod.
The moulding stage
Once the required curl is achieved, the hydrogen is removed by the neutralising process.
The neutraliser releases oxygen which links up with the hydrogen from the perm lotion.
Hydrogen and oxygen = H2O (water).
This is rinsed away and the sulphur bonds link up with a new partner (disulphide bonds) in a new, fixed shape.
The fixing stage
Perm lotion contains 2 chemicals:
Opens cuticle – hair swells and allows the
product to penetrate into the cortex
Breaks down the disulphide bonds to
allow hair to re-form into a new shape
1 + 2 = AMMONIUM THIOGLYCOLLATE
An oxidising agent mainly used in alkaline
An oxidising agent mainly used in acid perms
as it is less irritating to the skin
WHAT HAVE YOU LEARNT TODAY