what can be done?

Question

to prevent the bright red hair dye from running into the blonde when its colored and whenever its washed
(naturaly i have dark brown hair)

Answer 1

If you insist on dying your hair two or three kinds of colors, then get it professionally done.

Answer 2

First of all if you have two colours that need to be kept apart from each other when being colored I would suggest going to a salon. However when you are washing your hair and some of the dye is washing out dont be alarmed it wont dye your blonde red.

Answer 3

wrap the blond hair with tin foil then color