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.
When you give blood after getting a tattoo, you may want to wait at least a week, even if you are allowed to give blood right away, as tattoos often cause low-level inflammation. Giving your body a chance to recover will ensure that your blood passes the screening procedures used to test donations.