it depend on how blonde you want your hair juss leave the beach in till the desired blondee
long hair
3hours
Around 25 Years.
Most likely, if you used dye, it stands on the package
45-60 mins MAX
It depends on what type of hair you have. soft, straight take about 45 mins- 1 hour. dirty and greasy take twice as long
It can cause irritation and chemical burn the skin. The same happens to your scalp if you leave it on to long.
about 10 minutes i am a hairstylist so that's what i believe.
no, it won't bleach your hair but it will dry it out!
You can leave bleach on the hair for up to an hour. After this it will not work. You have to make a fresh batch. The more time that the bleach is out in the air the less time you have to put it on the hair. The ends are dark because there is more of a build up of colour there. You will have to do this on a few separate occasions. Because your hair is black the bleach will take longer to take the colour out. Black changes to red, the orange then blonde, it does take longer to get black out.
It depends on what type of bleach you are talking about. If you are talking about HAIR bleach then the answer below is correct. Bleach takes off the color of your hair making it easier to dye your hair. Yes you could leave it white after bleached but it will damage your hair eventually if you bleach it too much. If you are talking about common household bleach, it is possible. BUT, you will get many unnecessary toxins that you would not get from normal hair bleach. Plus there is a risk that the next day your hair will break off in chunks if you used household bleach.
Putting bleach, or peroxide, in your hair, will cause it to become a lighter shade of whatever color it already is. They strip the color from your hair and leave it very rouch and horrible to the touch.