Grey hair/bleached hair

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lucycham

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Hi everyone,

I need something explainig to me. Why is it that when you colour grey hair you dont have to add pigment. For example you can put a 5.0 on it and it will come out a 5.0 but if you put that on bleached hair it would come out a horrible muddy colour?

L:irked:
 
Hi everyone,

I need something explainig to me. Why is it that when you colour grey hair you dont have to add pigment. For example you can put a 5.0 on it and it will come out a 5.0 but if you put that on bleached hair it would come out a horrible muddy colour?

L:irked:

When you say "grey" hair I take it you mean "white" as I'm sure you know there is no suck thing as grey hair... Just a mixture of pigmented and white hairs....

Now to the question at hand... If you had a head of hair that was a nb of 6 with 80 % white hair and your target was say a5.35 you would have to add base shade to cover the white hairs fully... In the case of loreal a golden basic.. This would add the extra dye load required to fill the empty white hairs and stop it looking translucent..

In a bleached hair you have bleached out all the pigments possibly bar the yellow..the cuticle layer has also been compromised.. you could put a warm shade straight on but it wouldn't really anchor very well and would also appear translucent.. If you applied a flat or cool shade with blue pigments it would mix with the existing yellow undercoat to give a sludgy muddy green caste..

So a white hair is empty of pigment and a bleached hair most likely still has yellow pigment... ;)
 
Bleached hair and natural hair are completely different starting points. Whether there is grey or not, natural hair still has an intact cuticle and a healthy fibre. The grey is a mix of pigmented and non pigmented hair where you can put a base straight on.

Bleached hair has a different porosity as oxidation dissolved internal bonds aswell as pigments like brown, copper and yellow. These pigments have to be put back in order for your target to appear true.
 

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