3 weeks or more is best
varies from original hair color shade if hair was died before and different bleaching techniques
24-48 hours
I recommend waiting at least 2 weeks, but it is very damaging to hair to put more than one chemical process on it.
Blonde hair should not turn orange after bleaching. If it is, it is due to one of two reasons: 1). The bleach was not left on the hair long enough. 2). The developer was not strong enough. Be sure to read the directions in regards to the processing time and try using a 30 volume cream developer.
Same theory as the sun bleaching out/fading out clothes that hang in a car too long, so yes it could fade your hair too, means drying damage too maybe
At least two weeks, and it would still damage your hair badly. I'd decide whether bleaching or perming is more important to you and just do that one.
I'm not entirely sure what you mean by burning yourself. If you mean the burning sensation you feel on your scalp when you've applied bleach to your roots, then that means you applied the bleach to your roots too soon or you left it on to long. Every at home bleach kit comes with instructions for a specific reason; bleaching hair is severely damaging and can be (if not done properly) somewhat hazardous for your health. How lightening or bleaching works is it opens the pores of your hair shaft and breaks down and decomposes the melanin(color) of the hair. During the process it diminishes strength and the chemical bonds in your hair, which is why when some people bleach their hair it falls out. Bleach should have minimal to no contact with skin because it can be absorbed by your skin just like it can be absorbed by your hair and unlike your hair, your skin will become irritated and more than likely bleed. If you did happen to damage your scalp while bleaching, my suggestion to you is to gently rinse your scalp with room temperature water and don't rub or scratch, that will make it worse and could cause infection. Blot your head dry and avoid using heat. If you were bleaching your hair to radically change your hair color and your scalp was damaged, I strongly suggest waiting 24 to 48 hours before you complete your hair project, for the sake of your skin's health. The next time you decide to bleach your hair, please read the included instructions thoroughly and follow them precisely. I also think consulting a professional to learn more about your hair's texture, courseness and porosity to help you determine how long you should leave the bleach in your hair and when you should add bleach to your roots.
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.
long hair
If you already have dyed your hair a dark color you need to bleach it out, your hair should turn a blonde yellow color, then bleach it again. Then buy a white hair dye. Then leave that dye in your hair for a good 45 minutes. Then your done! I wouldn't suggest dying your hair again for a very long time because this can be very damaging. And this will work much better if your hair is its natural color.
no, it won't bleach your hair but it will dry it out!
a haircoloring booster is something that you add to make the hair extra light..you have to add this to hair color though..you can't put this on hair by itself..neither are good for your hair..but as long as you don't constantly color your hair..bleaching it one time should not be a problem or even make it look bad.