about 18 weeks, then they really fade
Schwarzkopf is a popular brand for temporary hair colouring. Their website also offers information about temporary colour and how long they last and also the effect it has on the hair.
As long as you want... I guess
It takes about 20-30 minutes to actually put the color on your hair and then you have to leave it on your hair for 25 to 45 minutes, depending on the color. It should say on the box. If you leave it in longer than you are supposed to you hair will be more brittle and may break off.
Overnight
Depends on the bleach, how much colour is on the hair etc. Probably around 40 minutes, you will probably need to tone the highlights and you'll DEFINITELY need to keep checking. For a caramel you should lift your hair to an orange-yellow colour, then tone.
month or 2
Until it beeps.
2 minutes
how long do you leave a doberman tail
black high heels
pink