What will happen if i put peroxide in my natural hair that is dark brown?

It will lighten it gradually, especially when heat is applied such as with a hair dryer. Most likely will turn it a reddish brown.

What will happen if i put peroxide in my natural hair that is dark brown?

It won't lighten much, but it will be noticable.

What will happen if i put peroxide in my natural hair that is dark brown?

Not much. Do a mix of half peroxide half water in a spray bottle. It will gradually lighten your hair, producing a sun streaked affect. Spray your hair lightly all over, wait a couple of days to see result then continue use to lighten your hair as much as you wish. The color of your hair will probably generate more reddish streaks than blonde. Use hot-oil and conditioners to keep up the health of your hair.

What will happen if i put peroxide in my natural hair that is dark brown?

it wont tern it to the color on the box but it will be lighter. I've colored my hair every color in the rainbow. So that's personal experience.

What will happen if i put peroxide in my natural hair that is dark brown?

it will lighten slightly...and lift some of the red in your hair...peroxide is 10 volume and since you don't have an activator you won't get much of a lift