In regard to the theory of colour
Explain Colour with reference to Physics, including white light and the colour spectrum, light and colour in art, white light and the prism, the logic of the rainbow's colours, and light as a stream of particles.
Explain Colour with reference to Chemistry, Biology, Psychology and technology.
Explain the source of colour with reference to the properties of light, and tints and shades.
Discuss colour with reference to primary, secondary and tertiary colours.
State and explain the laws of colour with reference to:
- The colour star or colour wheel;
- Creating colours from primary and secondary colours;
- Neutralisation of colours;
- Complementary colours;
- Intensification of colours.
To explain natural hair pigmentation with reference to:
- Formation of natural pigments;
- The pigments naturally occurring in melanin;
- Types of melanin;
- The four natural hair colours;
- Greying of the hair;
- Albinism;
- White hair;
- Types of pigment granules.
Explain hair colourants with reference to:
- Temporary colour (Azo dyes);
- Colour frictions (plastic bonded colours);
- Other temporary colour;
- Semi-permanent colouring (nitro dye);
- Permanent colour and oxidation tints;
- Vegetable dyes including Henna, Gallnuts - pyrogallol, Camomile and other vegetable dyes including those with metallic salts, and non professional products with metallic dyes or colour restorers.
To explain how a tint works with reference to the different dye intermediates and their:
- Effect on the hair shaft;
- The oxidation process and what it means;
- Types of vegetable colourants.
Discuss and explain permanent hair colourants with reference to:
- The ingredients and function of tints;
- The functions of tints;
- Dangers of Para dyes.
Explain the diagnosis and Analysis of hair and scalp for the tinting process with reference to:
- Scalp condition;
- Condition of the hair;
- Hair texture and porosity;
- The analysis sheet.
Discuss and explain colour selection with reference to:
- The tint shade chart;
- The desired new level of colour, bearing in mind that what the client wants is paramount;
- Taking into account the inadequacies of artificial light in deciding on colour;
- The effect of other coloured objects on colour choice;
- The tint manufacturer's colour card;
- The reflect colour or hue;
- The hairdresser's role in selecting colour for a client with reference to the complexion of the client, examining the hair for colour selection, groupings of basic colours, how to use a shade chart, the strand test for prior chemical treatments, the strand test for colour assessment, and taking past treatments into account;
- The factors determining colour choice.
Discuss and explain coverage of \grey hair with reference to:
- Coverage;
- Mixing the colour;
- Application of tint;
- Timing of the tint on the hair;
- Observe development of colour .
Discuss hydrogen peroxide with reference to:
- The uses of H202;
- H202 strengths and what we mean by "volume" of peroxide, conversion of peroxide strength from % to volume and vice versa, dilution of hydrogen peroxide, the peroxide dilution table, and measuring the strength of hydrogen peroxide;
- Oxidation of Para pigments;
- Factors that result in the decomposition of H202;
- Storage of H202.
Discuss high lifting tints.
Discuss toners or colour additives.
Explain the need for after tint treatment.
Pre- and post-tint treatments with reference to pre-softening and pre-pigmentation of the hair, the procedure if Pre-pigmentation fails, and correcting the electrical imbalance of the hair (ionization).
Discuss combination colouring.
Discuss tinting after pre-bleaching, and colour fillers.
To give an account of colour reduction or tint removal.
In connection with safety precautions as applied to hair colouring and lightening
Demonstrate that you are conversant with, and are able to apply, the safety precautions involved in every step of hair colouring including:
- Testing the hair for prior chemical processes;
- Testing the hair for metallic salts;
- The patch test for allergy or sensitivity;
- Those that apply to the handling of tools.
Demonstrate the sanitation and sterilisation procedures and precautions involved in every step of hair colouring and lightening, including the sterilisation of implements and tools.
Assemble an equipment trolley.
In connection with Permanent Colouring
Complete an Analysis Sheet to select colour and oxidant strength.
Apply tint by demonstrating the following steps:
- To clean the hair and gown the client;
- To mix the tint;
- To section the hair;
- To apply the tint;
- To apply tint to long hair; regrowth and virgin hair
- To apply semi permanent colour as if it were tint;
- To demonstrate the correct use of development time;
- To use additional heat when required;
- To demonstrate tinting close to natural colour;
- To demonstrate the removal of the tint and the proper aftercare procedure.
Explain and exhibit an understanding of: the procedure for pre-pigmentation.
Exhibit how to correct the electrical imbalance of the hair.
Exhibit three methods for pre-softening.
Perform strand tests for prior chemical treatments, and for colour assessment, to test for metallic salts, and to perform the patch test for allergies.
Exhibit the colour reduction process, to test for colour reduction, and tinting highly bleached black hair back to the original colour.
Explain various techniques for fashion colouring.
In regard to bleaching of hair
Discuss the principles of hair lightening by bleaching with reference to:
- Action of bleach on the hair shaft;
- Action of bleach on pigment;
- Types of bleach;
- Ingredients and function of bleach preparation and the active life of a bleach once applied.
Discuss the bleaching process with reference to:
- Diagnosis of natural hair colour;
- The problems of natural orange pigment and prior tints;
- Hair porosity;
- Choice of bleaching agent;
- Mixing hydrogen peroxide into bleach powder;
- Applying the bleach;
- The use of heat and its effect on the bleaching process;
- Processing time;
- Stages of lightening;
- Colour toners;
- Stages of bleaching;
- Bleaching problems;
- Highlighting techniques and their effects;
- Selection of aftercare products;
- The problem of creeping oxidation.
In connection with safety precautions as applied to hair colouring and lightening
Demonstrate that you are conversant with, and are able to apply, the safety precautions involved in every step of hair bleaching including:
- Testing the hair for prior chemical processes;
- Testing the hair for metallic salts;
- The patch test for allergy or sensitivity;
- Those that apply to the handling of tools.
Demonstrate the sanitation and sterilisation procedures and precautions involved in every step of hair colouring and lightening, including the sterilisation of implements and tools.
To assemble an equipment trolley.
Demonstrate the application of bleach both as a retouch and as an application to virgin hair and:
- To clean the hair and gown the client;
- To mix the bleach;
- To section the hair;
- To apply the bleach to virgin hair and as a retouch.
Demonstrate various fashion techniques with bleach including slicing, scrunching, highlights, the cap method of applying highlights, woven highlights, tipping and the bleach bath.
Complete the Hair Lightener Analysis Sheet accurately and in detail. |