I have Masters degree with Distinction and Student of the Year Prize in Corrosion of Engineering Materials from Imperial College London, first degree in Chemistry from University of Central Lancashire and also did Technology, Material Science and Engineering and Mathematics from the Open University.
In areas where tattooing is not as closely monitored, people are asked to wait for 12 months to give blood after getting a tattoo. This waiting period ensures that the donor is free of any potential blood-borne diseases which could have been passed on unsanitary equipment.
Best Answer: You can't give blood until a year after getting a tattoo as that should be enough time for any complications or diseases to show up. They just don't want you going and getting anyone infected if you received a tainted tattoo. I've had blood work done a day after getting a tattoo.