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Colouring/lightening
Theory Knowledge
| Question | Answer |
|---|---|
| Which colouring products no not require a skin test | temporary/semi permanent |
| What chemical product contain nitro/para dyes which will require a skin test prior to colour application. | Semi permanent colour |
| What is hair natural pigment called for warm tones | Pheomelainin |
| What does ICC mean | International colour chart |
| The principles of the colour star when colouring is what? | neutralise colour |
| How many times will high lift products lift the hair | 4 to 5 shades |
| The cool natural colours of the hair are known as what | Eumelanin |
| High levels of pheomelainin are found in what natural hair colour | light hair |
| Blue red yellow are known as what? | primary |
| One of the main legislations that we should abide bye when colouring | COSHH |
| if you suspect that the clients hair might have metallic salts what test would we carryout | Incompatibility |
| what is another name for developer | peroxide |
| What is the ph level for hair | 4.5-5.5 |