Hi,
or you could do some test pieces first to take any guess work out of it ,
this will show you and the client exactly how it will be ,
Just say you go ahead
and it comes up to a decent orangey colour,
it would need toning down as the lady now wants it chocolate brown instead
I think the tricky part is toning the orangey mid lenghs and ends
(which is on very long hair) whilst highlighting with bleach and foils (especially if you are on your own )
after drying off
perhaps do a medium warm choc brown tint on the roots
placed on while (just a few blonde foils are taking )
then swap to a lighter warm milk choc brown on the mid lengths and ends ,
and watch very carefully as sometimes
it can really grab
if the hair is very porous .
sometimes I find that demi / semis on pre bleached hair
can suck up on the depth lose tone and go way too dark ,
(your test pieces will show you if this happens )
in this case you may be wiser using tint to tone the orange instead
when timings are complete,
rinse all the tint off first
leave the foil on your highlights and rinse these last
so they will stay nice and bright,
as with any colour correction (dont make any promises )
let the client know the colour she wants may not happen at the first couple of appointments
and that it may take a few visits ,
also do advise the client on how much it will cost ,
so there are no surprises
Another thought is that if you are working on your own,
time wise
It may be better for you to concentrate on getting just a nice choccy brown base colour at first
Then you could perhaps do the foil blonde highlights at a later date
when the condition is a bit better and she has had a couple of cuts especially on her layers ,
good luck :hug: