No u should always wash it before and after:d
Yes and after.
Yes, & you should. Your hair should be really clean, actually, before colouring it. If it is not, the colour will not take as well.
Yes
you can if you want to, but you don't have to.
As long as you wash your hair with shampoo before going to bed than it should not.
You can (and should) bathe and wash your hair when you have a cold. Just make sure you dry your hair completely before going out in cold weather.
No, unless the hair is VERY soiled or has heavy product build-up.
Wash dreads at the same temperature you washed your hair before you started the deadlock process
Yes, you should wash your hair if you are sweaty. Washing your hair is on an "as needed" basis. If your hair is greasy or sweaty you need to wash it.
Don't matter they wash it before they start
Normally, especially when you're bellow age 20, you should wash your hair once every morning/night. But if you have died your hair before, then you should limit you washing down to three to four times a week to prevent drying out your hair.