A person never needs to have bleach in contact with their face or any part of the body.
It depends on where you are. Heres a list of how long different records should be kept. I think this is in the UK
Medical records should be kept for as long as required based on the type of record, and federal/state laws.
It will not hurt as long as it is on the hair. You should not touch the scalp or your hands with it as it will burn and you should never use household bleach because your hair will dissolve in it.
It should be kept for the life of the individuals involved in the legal matter, in a water and fireproof storage area. It should be kept because it may be needed.
Hair bleach does not stay active for very long once it has been mixed. It begins to lose strength quickly and should be used within an hour.
Ultraviolet light is almost as effective as chlorine as far as the ability to bleach cloth goes.
forever
45-60 mins MAX
Most likely, if you used dye, it stands on the package
Usually, any time after. But you should check the dye and bleach boxes just incase. If you can bleach your hair after, just make sure your hair can handle all of the chemicals.
Most facials should be left on for 30-50 mins for a relaxing day! But if you need a quick one you should only leave it on for 10-20 mins
A quick wipe with household bleach on a soft cloth should kill the mold and remove it. Do not leave the bleach on for very long as it will discolor the material.