NVQ Level 3

GH17 / GH18

Colour / Colour Correction

Hairdressing Work Packs

Introduction.

The units GH17 Colour Hair using a variety of techniques and GH18 Provide Colour Correction will build on the knowledge gained from NVQ Level 2.

Many people use colour to convey their individual personality, to keep up with fashion, to enhance their appearance. All kinds of natural and artificial materials have been used to colour the hair.

Today colouring is arguably the most exciting and often the most difficult aspect of contemporary hairdressing.

This booklet will help give you a better understanding into theory of colour.

Hairs natural melanin

What is the name of the two main types of pigment found in the cortex?

What colours do the two main types of pigment produce?

Eumelanin =

Pheomelanin =

How is the natural pigment formed?

How is natural white hair formed?

How will the amount of melanin and pheomelanin in the hair affect the colouring process?

How does natural light affect the hair colour?

How does artificial light affect the hair colour?

How would you complete a thorough consultation for colour services? What questions would ask?

What is the p.H of the following products?

Temp –

Semi –

Quasi –

Permanent –

Bleach –

H2o2 –

Explain how the following colour types work?

Include illustrations!

Types of Colour - Temporary

Semi – Permanent

Quasi Colour

Permanent Colour

Bleach

Describe the differences between

Oil bleach. Cream bleach Powder bleach

Why would you use the following strengths of Hydrogen peroxide?

Strength of hydrogen peroxide Usage and shades of lift

6% (20 vols)

9% (30 vols)

12% (40 vols)

Diluting of peroxide to desired strength

Strength of hydrogen peroxide

Ratio of peroxide (parts)

Ratio of water (parts)

Strength of hydrogen peroxide

6% (20 vols) + = 3% (10 vols)9% (30 vols) + = 3% (10 vols)9% (30 vols) + = 6% (20 vols)12% (40 vols) + = 3% (10 vols)12% (40 vols) + = 6% (20 vols)12% (40 vols) + = 9% (30 vols)18% (60 vols) + = 3% (10 vols)18% (60 vols) + = 6% (20 vols)

18% (60 vols) + = 9% (30 vols)18% (60 vols) + = 12% (40 vols)

The Colour Star

Illustrate the colour star and explains it’s purpose

Hair Tests to Consider. Explain each of the following tests. How, why and when we use them?

Incompatibility test

The incompatibility test

Porosity test

Elasticity test

Skin test

Strand test.

Provide Colour Correction Services

There are two methods of removing unwanted synthetic (artificial) colour from the hair:Oxidation & Reduction – Explain both terms

How do they work? Why would we use them?

.

Recolouring hair that has had reduction method.

What do we need to consider ?

What is meant by the term Oxidation?

Pre lighteningIf the client requires a warm target shade, do we need to think about natural undercoat as well when choosing colour for target shade?

Red Red/ Orange Orange/ Yellow Yellow Pale Yellow

5 6 7 8 10

If Target colour is medium warm blonde so 7.34, 6.34 or 7.G, where would you need to lighten to? Which colour would you select?

Why do we use the Pre softening technique?

Explain the term Pre - Pigmentation ? What is it’s purpose?

How would you use a Corrective highlights/ lowlight technique, why?

What has happened to the hair when there is banding present?