One thing I wanted to mention that some of you may not be aware of regarding tattoos and blood donation...If you live in a state where the tattoo shops aren't state regulated, then you have to wait 12 months to donate blood. 40 states currently regulate tattoo shops.
This is from the Red Cross website...
Tattoo
Wait 12 months after a tattoo if the tattoo was applied in a state that does not regulate tattoo facilities. This requirement is related to concerns about hepatitis.
Acceptable if the tattoo was applied by a state-regulated entity using sterile needles and ink that is not reused. Cosmetic tattoos applied in a licensed establishment in a regulated state using sterile needles and ink that is not reused is acceptable. There are 40 states that currently regulate tattoo facilities. You should discuss your particular situation with the health historian at the time of donation.