Grey to blonde help, getting back to hair but this one has me stumped!

[tweetypie89]

So I have a woman who wants to become my client, I am just getting back in to hair after a long break.
She currently has a very very warm blonde/auburn mess (Daughter used a highlift tint apparently).
She has a bob (2" from nape), underneath is very damaged from previous hairdresser (2"at least), she is Greek so natural hair is was dark and probably around a 4 with around 50-70% grey.
She would like an ash blonde, with high and low lights (mixture of beige and ash) (Which I know how to do) the question is how do I lighten grey hair? Do I just go in like I would a none grey client? Do I pre soften? etc etc I only understand grey as far as tinting :/ please help... Desperate!

Edit to add her lightened hair is around an 8 and I use Wella and Goldwell

 

[tweetypie89]

Hmmmm... back to hairdressers helping hairdressers on Facebook. I forgot how unwilling people are to help on this group :/

 

[EssexFreelance]

I would just adjust your formulas as if you were doing a global colour so if your using 8/1 as a lowlight then I would do 8/0 and 8/1.

There is no need really to pre soften any hair and is not recommended by manufacturers usually

 

[Lolajade]

Grey hair (mixture of white and natural hair giving the look of an iron grey) can be lightened with tint or bleach just like normal hair . Any areas with 100% White Hair will need no further lightening but you can add in a blonde colour using a tint in the shade you require to give it the blonde or beige colour . ( using a higher ratio of natural in your mix to ensure good coverage)