It depends on the shade that you have chosen, the health of your hair, and the type of formula. Healthy hair should hold color that is within 2 levels of the natural color for 6 weeks.
If your hair is severely damaged, it will not be possible to get a color that requires pre-lightening, such as pink, without risking severe damage and breakage.
Leather is porous and will tend to absorb whatever quantity of wax is applied. Try wrapping 2 layers of clean white newsprint and ironing the surface. You need to have...
Vinegar does not remove hair dye. It'll actually seal up the hair and make it harder for you to remove the color from your hair. The only way you can...