Since paper is usually printable on both sides, you merely have to take it, flip it over, and place it back into the printer’s paper tray for reuse.

Just make sure your wording or design is centered and place the flat paper bag in your printer's tray as centered as possible.

How to Change Settings for the Thicknesses of Paper in Printers. Many printers allow you to print documents, images and print material on various papers including transparency, stationary, canvas ...