What's the difference between grating stereo printing and holographic stereo printing?

Grating stereoscopic printing is a kind of printing that uses grating plate to make images have stereoscopic effect. This kind of printed matter can directly observe the three-dimensional image on the two-dimensional plane image without any tools. People can naturally have a three-dimensional sense when observing objects because there is a certain distance between people's eyes. When observing an object, the left and right eyes look at it from different angles, forming the visual difference between the two eyes, and the various images formed are reflected in the brain, resulting in a sense of distance and three-dimensional sense. Pre-press production is based on this principle, using cylindrical lens stereo grating to realize stereo imaging, that is, using the depth sense formed by parallax and convergence of human eyes to realize the three-dimensional sense in human consciousness.

Holographic three-dimensional printing is a replication technology that transforms the interference fringes formed by laser photography into three-dimensional images and displays them on a specific substrate. It is a new three-dimensional printing technology developed on the basis of holography.

Holographic stereoscopic printing is not printed with ink, which is similar to the method and process of conventional printing. Holographic stereoscopic printing needs to take a holographic image first. Before shooting holographic images, we should choose the appropriate theme and the best layout of its space, and pay attention to the influence of light. When the holographic image is not properly illuminated, it will not show any features of the recorded scene. The shooting of rainbow holographic images is based on the diffraction characteristics of light. It is made by placing a photoresist plate, exposing, developing and fixing.