As a mystery writer, I am fortunate to live in the Washington-Baltimore metropolitan area with its plethora of agencies involved in fighting crime. Yesterday, I spent the day at the U.S. Treasury Department, finding out how money is made and being amazed at the many intricate details that go into foiling counterfeiters. Even the paper used in printing money, a blend of cotton and linen fibers, is difficult for counterfeiters, who will generally stick to wood fibers.
We took the standard tour for visitors, then were treated to a behind-the-scenes tour by a friend who works as an engraver there. He pointed out the painstaking care and high craftsmanship required to prepare the plates for printing the money. This includes incorporating many more details to foil counterfeiters.