i'm in my early 20s and i want to dye my hair black with bright blonde chunks. i am allergic to sulfites and when i did a patch test with the ecocolors it came out well- i didn't react to it at all. my question is- should i dye my hair all blonde (it's a med-dark brown right now) before dying most of it black? or should i do the black and blonde at the same time?
