Two direction display method in stereo printing of gravure press. Can be divided into stereoscopic method, color filter method, polarizing filter method and alternate segmentation method. No matter which method is adopted, the stereoscopic vision is obtained by observing the image with the binocular parallax, the left eye and the right eye respectively. Stereoscopic method: the basic principle of the stereoscopic mirror is to use the stereoscopic mirror to observe the left and right figures to form the stereoscopic feeling. This method has been widely used since nineteenth Century, but special stereo lenses must be used, otherwise there would be no stereoscopic vision. Two color color filter method: the left and right images are printed in the same plane with red and blue ink respectively, and the printing images are observed by red and blue color filters. Because of color and ink complementary color, so the image is not observed by color red and blue instead of black. Therefore, this method is limited to black and white photographs and is not suitable for color printing. Add different wavelengths of light into the eyes, respectively, and make eye fatigue. Therefore, in addition to making aerial maps, this method is rarely used.

This is the introduction of the dimensional printing of the gravure press.