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Health and safety (Continued). Client mixtures:

Always wear rubber gloves whilst using hair dye on either clients or testing Mix one tube of permanent hair dye with 75 mls of 6% hydrogen peroxide
strips. Do not mix the hair dye formulas in enclosed areas, always use well for a (whole head application).

ventilated or open spaces.

Mix a half tube of permanent hair dye with 37.5 mls of hydrogen peroxide
Optional precautions would be to wear a face mask and protective glasses for a (roots application).

whilst bleaching and colouring hair.

When applying a hair dye for the first time. Apply hair dye to the middle
Hydrogen peroxide strengths: lengths and ends wait 20 minutes. Then mix half a tube with 6% and apply

Hydrogen peroxide is manufactured in different strengths and labelled as to the roots and comb through. Leave for another 20 minutes. Then

either volumes or percent. The table below is a conversion table displaying shampoo out and blow dry. The reason behind this 2 part application is

volumes translated into percent. Keratinisation, as the hair grows away from the scalp; approximately after 6
weeks in the atmosphere the hair begins to harden. This is Keratinisation, it

10 volume = 3% takes longer to penetrate and remove pigments. The first six weeks growth

20 volume = 6% (roots) remains soft and the pigments are removed almost immediately.
30 volume = 9% Please see Fig 3.

40 volume = 12% Fig 3.

60 volume = 18%

100 volume = 30%

PerfecTress Colour College only works with hydrogen peroxide in the

European measurements (percent). In particular only 6% and 9% are the
only strengths used for bleaching or colouring. Thereby, ensuring no

chemical damage to the hair from either process,

When permanently colouring hair:

Mix with 6% for the same base shade; or one shade lift.

Mix with 9% for two shades lift.

i.e.

To colour base shade 6 to a 6.1 use 6%.
To colour base shade 6 to a 5/ 4/ 3/ 2/ 1 use 6%.

To colour base shade 6 to a 7.1 use 6%.

To colour base shade 6 to a 8.1 use 9%.

It is not possible to lift a permanent darker colour with a permanent lighter