How To Mount a Print (About.com)

This is actually a pretty useful lesson for those looking to make a hinge-mounted mat.
Mount a Print
Photographic prints should be mounted so they can be removed from the mount easily, and do not touch the glass if they are framed. This is done by using a window overmat. Cutting mounts requires special equipment and some practice, and although many photographers do mount their own prints, others are happy to leave the job to a professional framer. The advice here is still useful, as not all framers are trained to handle photographs.