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.
1 Double red cell donations take approximately 30 minutes longer than a whole blood donation and allow you to give two units of red cells. 2  Available in most donation centers and some blood drives.3  Donors are eligible to give double red cells every 112 days.4  Learn More about Double Red Cell Donations Â». This type of blood donation usually takes about an hour, though the actual donation takes about 8-10 minutes. 2  You are eligible to donate 'whole blood' every 56 days.