How long does it take until the cocoa actually dies your hair I've heard that people die they're hair with cocoa how long does it finally start to darken Can you straighten it after is it done?

I can't see any possible way cocoa would work as a hair color. There are two kinds of hair color: permanent and temporary. Permanent color has chemicals in it to "open up" the hair strand so the color can embed itself in the hairs. Temporary color is more like a paint--it sticks to the outside of the strand, and washes off in time. Cocoa couldn't work itself into the strand, and it doesn't have any way to stick to the outside.

I am sure you could put cocoa in hair gel and make a temporary color, but it would wash out the first time you shampooed. OTOH, it would smell REAL good.