hairs natural ph level?, 4.5-5.5, 7, 8-9.5, neutralising tones, yellow-purple, red-blue, green-red, green-orange, orange-blue, purple-green, select 3 correct statements about oxidisation, oxidisation is a chemical process that involves addition of oxygen, additional oxygen comes from hydrogen peroxide, oxidation removes oxygen, oxidisation happens on resistant hair, peroxide breaks down chemical bonds and is the oxidisation agent that releases sulphur, which accounts for characteristics of colour., oxidisation replaces pigments, why do we have colour fade?, not pre-pigment the hair, incorrect choice of colour and product, remove bands in hair, overlapping of colour application, over processed hair and poor porosity / elasticity, how to prevent translucent colour coverage ?, add a intensive depth/double base in colour, use correct peroxide choice, correct formula for grey coverage, reapply colour, provide penetrating treatment, uneven porosity, click the right depth, 3-dark brown, 5-medium brown, 7-medium blonde, 4-black, 10-lightest blonde, 8-very light blonde

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