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Questions and Answers
list the 7 rules for colour correction
list the 7 rules for colour correction
- do not panic 2)determine nature of problem
- what caused the problem
- develop a solution
- take 1 step at a time
- never guarantee
- strand test
what 4 basic questions are asked when formulating for hair colour
what 4 basic questions are asked when formulating for hair colour
- what's the natural level and is grey present
- clients desired level and tone 3)are contributing pigments/ undertones exposed
- what needs to be mixed together to get desired result
name the 2 categories of hair colour and the sub categories of each also list 3 main characteristics for each sub category
name the 2 categories of hair colour and the sub categories of each also list 3 main characteristics for each sub category
non-oxidative temporary no patch test required large colour molecule physical change attaches to cuticle last one shampoo no re growth
semi patch test required physical change last 4-6 weeks 2nd largest molecule penetrates cuticle no re growth
oxidative demi mix with developer patch test required deposit only physical change no regrowth
permanent mixed with developer patch test required new re growth lift and deposit in 1 step application chemical change
what is the purpose of developer
what is the purpose of developer
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name the 10 degrees of decolourization
name the 10 degrees of decolourization
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explain the full procedure for virgin hair going lighter with colour
explain the full procedure for virgin hair going lighter with colour
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explain the full procedure for virgin hair going lighter with lightener
explain the full procedure for virgin hair going lighter with lightener
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list 3 points one each of the 3 structures of the hair and how colour effects each
list 3 points one each of the 3 structures of the hair and how colour effects each
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define hair texture and how it relates to hair colouring
define hair texture and how it relates to hair colouring
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porosity
porosity
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Study Notes
Colour Correction Rules
- There are 7 rules for colour correction:
- Identify the degree of decolourization
- Determine the underlying pigment
- Neutralize unwanted tones
- Establish a colour goal
- Choose a colour correction method
- Consider the condition of the hair
- Test the colour correction
Formulating for Hair Colour
- 4 basic questions are asked when formulating for hair colour:
- What is the natural level of the hair?
- What is the desired level of the hair?
- What is the tone of the hair?
- What is the condition of the hair?
Hair Colour Categories
- There are 2 categories of hair colour: Natural and Artificial
- Natural: + Virgin (never coloured) + Regrowth (new growth at the roots) + Previously coloured (coloured but not recently) + Characterized by: natural pigment, no colour deposit, no colour lift
- Artificial: + Permanent (uses developer) + Semi-permanent (no developer) + Demi-permanent (uses low volume developer) + Characterized by: colour deposit, possible colour lift
Purpose of Developer
- Developer is used to activate the colour, allowing it to penetrate the hair shaft
- It comes in different volumes: 10, 20, 30, 40
Degrees of Decolourization
- There are 10 degrees of decolourization:
- 1: Black
- 2: Dark brown
- 3: Medium brown
- 4: Light brown
- 5: Dark blonde
- 6: Medium blonde
- 7: Light blonde
- 8: Very light blonde
- 9: Lightest blonde
- 10: White
Virgin Hair Colour Procedure
- The procedure for virgin hair going lighter with colour:
- Consultation and colour analysis
- Choose a colour and developer
- Apply the colour and developer
- Process the colour
- Rinse and tone (if necessary)
Virgin Hair Lightener Procedure
- The procedure for virgin hair going lighter with lightener:
- Consultation and colour analysis
- Choose a lightener and developer
- Apply the lightener and developer
- Process the lightener
- Rinse and tone (if necessary)
Hair Structure and Colour
- Three structures of the hair:
- Cuticle: - Characterized by: outermost layer, protects the hair - Colour effects: can affect the penetration of colour
- Cortex: - Characterized by: middle layer, contains pigment - Colour effects: affects the colour deposit
- Medulla: - Characterized by: innermost layer, not always present - Colour effects: can affect the colour lift
Hair Texture and Colouring
- Hair texture: the thickness and density of the hair
- Hair texture affects hair colouring:
- Fine hair: can be prone to over-processing
- Coarse hair: can be more resistant to colour
Porosity
- Porosity: the ability of the hair to absorb and retain moisture
- Porosity affects hair colouring:
- Low porosity: can be resistant to colour
- High porosity: can be prone to over-processing
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