I’ve heard so many horror stories from clients who have come to me in efforts to reverse the other stylists mistakes. But fear not, there are ways to process a color correction service safely, without causing irreversible damage.
I usually formulate lighter, if I am striving for a medium to light brown tones with 20 volume developer. For highlights, I use 10 volume developer for more control to prevent brassiness while achieving the correct tone.
Note: If your is damaged, then you would have to treat it and make sure that it is in a healthy condition before any chemical service.
For maintenance, always use hydrating hair products since its more delicate now that it’s colored. Coloring and lightening your hair can be a drying or damaging process, therefore you have to put that moisture back into your hair.
Enjoy your new hair color!