Unit 305

• Hairdressing
• Higher Education (degree)

What you need to know

Key words

In your groups, recall the definition of the following key words:

• Alpha keratin
• Beta keratin
• Hygroscopic
• Salt bonds
• Hydrogen Bonds
• Di-sulphide bonds
• Polypeptide chain

Alpha Keratin

• Hair in its natural state

Beta Keratin

• Hair when it has been styled into a different shape either by drying or use of heated styling equipment

Hygroscopic

• When a material has the ability to absorb moisture from the atmosphere.

Hair is hygroscopic

Salt Bonds

• Temporary bonds which are softened by changes in the pH level of the hair and are reformed when the pH level returns to normal. Found in the cortex

Hydrogen Bonds

• Temporary bonds which are broken down by water or heat, and are reformed during either the drying and cooling process or use of heated styling equipment. Found in the cortex

Di-sulphide Bonds

• Permanent bonds and can only be broken down during a chemical service, like during the perming process. Found in the cortex.

Polypeptide Chain

• Chains found in the cortex of the hair. Made of amino acids and peptide bonds. Held together by temporary and permanent bonds

How does humidity effect the hair?

Humidity and the hair

Hair is hygroscopic, meaning it has the ability to absorb moisture from the atmosphere. 

When we go out in a humid environment, your hair will absorb the moisture, softening the hydrogen bonds and reverting from beta keratin (its changed shape) back to its alpha keratin (natural state)

Describe the physical effects of styling on the hair. Remember to use key terms!!!!!!!!!!!!

Physical effects of styling

Shampooing the hair breaks the hydrogen and salt bonds. These are temporary bonds which are found within the cortex. 

When you dry the hair, these bonds are reformed into a new, temporary shape. This is known as hair in its beta keratin state. When the hair is shampooed again it returns to its natural alpha keratin state. 

What are the 2 different types of questioning techniques you can use during consultation?

Describe an open question

Describe a closed question

Open and closed questions

Open questions usually start with words like "what",