Keratinisation is the process by which keratin, a high sulfur protein, is formed in hair, nails, and skin. There are two types of keratin - soft keratin found in skin containing 1-2% sulfur, and hard keratin found in hair and nails containing 4-8% sulfur and making up 97% of hair. During keratinisation, cells change shape and flatten out as they lose moisture and internal cell structures, leaving amino acids that bond together to form the keratin polypeptide chains.

1. 3/1/2013
Academy of Hairdressing and Beauty TAFE WSI
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KERATINISATION
KERATINISATION: The process by which keratin is formed
KERATIN: The name of the high sulphur protein found in the hair, nails and skin

2. There are 2 Types of Keratin
First one being soft Keratin (Skin)
•Contains 1-2% sulphur
•Has a high moisture content
Second one being hard Keratin (Hair & Nails)
•Contains 4-8% sulphur
•Hair is 97% hard keratin
•Structure of hard keratin in long fibres
Source:google

3. Changes in Cells during Keratinisation
There are 4 major changes that take place during keratinisation.
1.Cells change shape - new cells are round, cells elongate and flatten out. The
nucleus also flattens.
2.Cells lose moisture - from 90% to 10% moisture content at the end of
keratinisation
3.Cells lose nucleus, cytoplasm, centrosome and cell membrane - amino acids
are left
4.Bonds form between the amino acids - to make the polypeptide chain