3D printing is worth re-starting
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Humans have stereoscopic vision of both eyes, and printing has only provided flat media for a long time. At most, after some books are opened, there will be people, trees, backgrounds and other folded objects being opened, showing a multi-layered three-dimensional sense. . More than 50 years ago, the Japanese letterpress printing company used a corrugated convex lens to arrange neatly, and calculated the refractive index of the left eye and right eye image printed on the fine strip. After the printing is completed, the so-called "grating plate" is attached. The strip lens group must be completely parallel to the printed strip print. The images seen by the left and right eyes represent the identifiable three-dimensional image we see on the left and right sides. The raster image can be used to obtain stereoscopic effects. So far, in addition to the printing industry, the "corrugated grating" is still used to make stereoscopic and changing body magic mirrors. In addition to the slightly different stereoscopic changes seen by the eyes, the 3D three-dimensional effects of TV and screen are also commonly used in this way. The refractive panel of the image is used to make a medium that distort the light and distort the light to produce a visual effect of the three-dimensional or varying body.
For a long time, the printing industry has been the first to produce the refracting color of the lenticular sheet by the film. But 40 years ago, Taiwan has not been able to do the pre-press separation and slitting effect of the three-dimensional printing. The only way is to use solvent to soak Japan. The original three-dimensional map, after the glue layer is dissolved and separated, the original three-dimensional print is used to make a precise copy of the original inch. After the printing is completed, a suitable grating piece is covered, and this kind of pick-up is only the first step. Later, there was a self-made color separation work, which was also done by pure optical procedures. Today, there are a lot of calculation programs, and computer software can calculate the grating spacing, refractive index, and the distribution of the left and right images. All of them are calculated by computer. The calculated image files are naturally more accurate. In case there is still data. The program can be adjusted.
Nowadays, the production of 3D plane image is very formulated. In Belgium, 3D image newspapers are distributed. The bottle of Sichuan Yibin Wuliangye is also packaged in 3D printing and printed with Manroland UV printing. Only for an anti-counterfeiting purpose. However, grating plates printed with plastic sheets cannot be used for culture and promotional materials. Therefore, thick plastic grating sheets are not used, and thicker cultural papers or cardboards are used for printing. In some areas, there are image or text areas, which can be applied by film or UV glazing film casting method, perhaps also by inkjet method, all of which must have good parallelism and accuracy of the left and right position, in order to have a brilliant three-dimensional, changing body effect, if the parallelism is not enough There is a three-dimensional effect on the whole surface, so the tortuosity, uniformity and curvature of the grating formed by the grating lines are the key to the success of the three-dimensional effect.
Another reason for not using the grating plate is that the printing and processing can be applied locally with a grating effect, because the grating plate is only advantageous for the need of stereoscopic or changing images, and is not conducive to the analytical performance of the text and line patterns. The zigzag portion of the three-dimensional grating is glazed and then die-cast, but it is not a comprehensive die-casting pattern, which not only reduces the cost of buying the grating sheet, but also makes the design more reasonable. It is not easy to develop, it is more difficult to succeed, but it is not easy to have a market without research and development, so everyone still needs to think and work hard to have performance.