Whether you're making cyanotypes, sun prints, or other alternative processes that use a contact printing frame, the 20 x 24" Select Contact Print Frame from Photographers' Formulary is an ideal choice to make your personalized work. The frame is made of a solid 2" ash wood with a felt-lined 1/2" plywood that is hinged, so it can be easily removed from the frame. By placing the material against the museum-grade glass, positioning the felt-lined backing, and closing it with the swing arm locking mechanism, it keeps the print completely flat for exposure to light. To ensure complete exposure of the material, the glass is one inch larger all around than the print.