Printing backs

The next step in the process is known as "intaglio," where the first lettering is printed, along with the bills' faces and backs.

Here, we see sheets of bills coming off the presses, where the backs have just been printed.

Click here to read the related behind-the-scenes story on the production of the next-generation $100 bill. And click here to check out the entire Road Trip 2010 package.