Stereo printing originated from the three-dimensional image negatives provided by stereo photography. Although the imaging theory of stereo photography has been put forward for more than 1 years, stereo photography has developed to a certain extent in this long time. However, due to stereo photo's adoption of the traditional optical principle in shooting and production, stereo photo has great limitations in its application. In addition, due to the expensive production equipment, complicated technological operation and high production cost, stereoscopic photography cannot be popularized, and stereoscopic printing is also affected by the long technological process and large accumulated error between processes in the prepress plate-making process, which reduces the picture definition and affects the printing effect.
in the 198s, with the advent of digitalization, the development of stereoscopic printing was promoted, and the production technology became more and more perfect and stable. Stereo printing has thus entered a brand-new era. Nevertheless, the rejection rate of stereoscopic printing is as high as 4%, mainly because it is difficult to meet the requirements of screen color separation and amplitude modulation dot accuracy of more than 3 lines/inch, and it is difficult to overprint screen angle and color printing. In the 21st century, stereo photography has entered the digital age, and stereo multi-image synthesis uses computer software, computer-to-plate CTP technology, and adopts FM dot high-precision printing equipment. The quality system of stereoscopic printing has been guaranteed. This technology is applied to packaging and decoration products, commercial advertisements, science and education cartoons, postcards, new year card, anti-counterfeiting labels, trademark tags, mouse holders, various credit cards and so on. Stereo printing will provide us with unlimited business opportunities.
CTP direct plate-making technology
In the past, stereo printing was a systematic project, including stereo camera, stereo computer plate-making and grating compound machine, and the development of each aspect required unique special technology; Unless the enterprise has the design and manufacturing ability in computer plate making, grating template and grating machinery, it is bound to be very difficult to start production; Moreover, the manufacturing equipment is expensive and the technical operation is complicated; The production cost is high; All these have affected the promotion and popularization of stereoscopic printing. The commercialization of stereoscopic printing is an arduous process, so stereoscopic printing can only be applied in a small scale in the past few years. Nowadays, with the application of computer technology and CTP, the problem of plate making has been well solved, and the application of three-dimensional products has been further promoted.
Stereo printing requires more screen lines, dots, overprinting and other aspects than ordinary plane printing, so special attention must be paid to the input of printing equipment.
Lotem 85 Quantum adopts thermal imaging technology with high production efficiency. After baking, the pre-heated plate made of Kodak Polaroid has a printing resistance of more than 1, prints with UV ink. Compared with the traditional exposed plate, the printing effect is better, the dot is firm, the ink is applied quickly, the ink balance is instantly achieved, and the waste of machine adjustment is reduced, which is very beneficial to long-run printing.
meanwhile, otem 85? The range of Quantum resolution is 12-254dpi, and the appropriate resolution can be selected according to the needs of the job. Creole square spot imaging technology has good predictability and consistency, which can ensure data integration.
digital CTP system
The birth and development of any new thing will meet with great resistance. CTP is a completely new technology, and it is applied to three-dimensional stereoscopic image printing. There are subtle relationships among stereoscopic images, RIP and output devices. Therefore, there are still some problems in the initial production. For this reason, the company organized engineers from equipment manufacturers, stereoscopic production experts and colleagues in the printing industry, and worked hard in many ways to finally solve the problem. The reason why the company can seize the opportunity in the field of three-dimensional image packaging and printing is also due to the research and development of new materials and the introduction of new technologies. I believe that with the successful sample delivery model, more and more enterprises will apply new technologies to increase the value of products, and the application fields of new technologies such as CTP will be continuously expanded.
due to the fine pixels of stereoscopic images and the magnifying effect of cylindrical grating, the number of screen lines must be above 12 lines /cm. Stereo printing and ordinary color printing have different screening angles, and the cyan and black versions should adopt the same screen angle. In addition, three-dimensional printing with different pitch should have different screen combination angles of yellow, magenta, cyan and black to avoid interference fringes. At present, the screening angles used by general manufacturers at home and abroad are: .6 pitch /cm, 1 lines /cm for color separation, and the degrees of screening angles are Y81, M36, C66 and K66；; .44 line spacing /cm, 58 lines /cm color separation, the degree of screening angle is Y5, M2, C65, K65；; .31 line spacing /cm, 81 lines /cm, the degree of screening angle is Y66, M22, C51, K51.
Three-dimensional printing has been printed with high-quality UV ink, which has many advantages:
① Instantaneous curing UV ink can be cured in a few seconds after printing, which obviously improves the production efficiency.
② The environmentally friendly UV ink does not use solvents, and does not emit pollutants during curing, which can improve the operating environment and prevent air pollution. At the same time, because there is no need for solvent treatment device and special environmental protection device, the equipment investment can be greatly reduced.
③ UV ink or UV varnish dried by photopolymerization will not cure as long as it is not exposed to ultraviolet rays. From this point of view, it is relatively simple to keep. Moreover, unlike volatile drying, photopolymerization is a kind of chemical curing, and the film hardness is higher than that of other inks, so it is suitable for printing with high requirements on film hardness.
④ High-quality UV printed matter has high gloss, good friction resistance, solvent resistance, heat resistance, etc., and high product grade. Widely used in packaging and printing.
⑤ saving energy UV curing consumes less electricity and saves energy.