how do i bleach white cotton clothes?

say i had a white cotton t-shirt and i got cut and got blood on it, then i washed it and dried it in the dryer several times. and now i want to try to bleach it to get the stains out. i want it to be pure white again. how EXACTLY would i go about bleaching it?

Answers:
miz bleach and water in a big pot and leave top soak then wash as normal

Other answers:
The stain has most likely been set by the multiple launderings. You might try a bleach pen, but I'd say it's probably never going to lose that stain completely.
The stain has most likely been set by the multiple launderings. You might try a bleach pen, but I'd say it's probably never going to lose that stain completely.
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