The tests were simple. Petri plates were coated with a control acrylic, the test Sharklet, or a copper foil. Copper has been recognized by the Environmental Protection Agency as an antimicrobial surface and was used for comparison. The plates were then contaminated with one of the most problematic surface contaminating bacteria, Staphylococcus aureus. After anywhere from 30 to 90 minutes, the bacteria were harvested and counted to determine if they had survived, thrived, or died.