How do you make hair dye?

Buy a box at your local store...then just follow direction as they say to do

How you apply it can vry depending on the brand or just how you are meant to put it on. Like some of them will be applied by shampooing it on, where as there are some quick dyes that you can just mix with water and put it on your hair.( I wouldnt reccomend those ones by the way)