A flipped image or reversed image, the more formal term, is a static or moving image that is generated by a mirror-reversal of an original across a horizontal axis (a flopped image is mirrored across the vertical axis). Many printmaking techniques produce images where the printed copy is reversed from the image made on the printing plate, so in a print copying another image, or a real scene or object, unless the artist deliberately creates the plate as a mirror-image of his subject, the finished print will be a mirror image of it. Many print makers developed the skill of reversing images when making printing plates, but many prints, especially early ones, have images that are reversed.