The watermark is usually a security feature discovered on genuine bills. Based upon once the banknote was produced, the watermark may be an oval or simply a duplicate from the banknote’s confront. Some trade dollar fakes have an applied rim- they struck the coin 'disc' first then pl

The pen has an iodine Alternative that reacts with the starch located over the wood-centered paper used to make fake bills. When used with a fake bill, the solution discolors it. The iodine Answer doesn’t react with genuine bills as they're manufactured with fiber-based paper. The paper