Analysis of the current situation of the hottest s

Analysis of the current situation of stereoscopic printing and anti-counterfeiting packaging

in the increasingly fierce market competition, the packaging of goods is particularly important. Good packaging not only gives consumers direct visual enjoyment, but also puts businesses in a favorable position in the competition of similar goods. Therefore, using advanced printing technology in packaging and decoration will get twice the result with half the effort. As a special printing method, stereoscopic printing not only gives people a richer visual effect in the appearance of packaging, but also realizes the anti-counterfeit packaging of goods. Three dimensional printing anti-counterfeiting packaging can be applied to tobacco and alcohol packaging boxes, food outer packaging boxes, pharmaceutical packaging boxes, cosmetics packaging boxes, clothing packaging boxes, daily necessities packaging boxes, handbags and other products. It not only improves the value and popularity of products, but also plays a role in occupying the vast consumer market for enterprises

characteristics of stereoscopic printing

stereoscopic printing is a special printing method, which makes the specially processed plane image present a stereoscopic feeling through the cylindrical lens grating plate, produces the depth of the image, and makes the observer feel immersive. Stereoscopic printing can realistically reproduce the stereoscopic sense of objects, with clear images and rich layers. The originals used in stereoscopic printing are usually stereoscopic photos or plane synthesis. The substrate is usually printed with cylindrical mirror grating plate or high-quality coated paper and high-temperature resistant ink, so it has good gloss, bright color and is not easy to fade. Stereo printing uses the principle of human parallax. Human stereo vision is the feeling produced by the binocular parallax generated by binocular eyes when observing objects, which is processed by the brain. Because there is a certain distance between the left and right eyes, when viewing the same object, the angle and distance presented by the left and right eyes when observing the object are also different, and there are differences in the angle of view or projection angle imaged on the left and right eyes. All these information are processed by the brain to produce a stereoscopic sense of the spatial distribution of objects

cylindrical lens grating has the function of image division. When combined with photosensitive negative, it can be used for photographing stereoscopic photos, and when combined with stereoscopic photos, it can be used to observe stereoscopic images. Cylindrical lens grating is a lens plate composed of many cylindrical surfaces in parallel. The focal length of each small cylindrical lens is designed to be the same distance from the thickness of the cylindrical lens plate. Place the stereoscopic photos obtained from stereoscopic shooting on the back of the grating plate, or arrange the combined dislocation images processed by software on the focal plane of the lens at the position corresponding to the optical axis. When the eye passes through the column panel at an appropriate distance, the left eye sees the left pixel, and the right eye sees the right pixel. The stimulation falling on the left eye and the right eye are two images of the same object, resulting in parallax. Images of different depths can be seen from different viewing angles, resulting in a three-dimensional sense

the main process technology of stereoscopic printing

stereoscopic printing has two types: one is traditional stereoscopic printing, that is, printing stereoscopic pictures first, and then compounding with gratings; The other is printing directly on the back of the grating

there are two kinds of traditional stereo printing processes in the acquisition of originals: stereo photography and software design synthesis. The stereoscopic photos obtained by stereoscopic shooting can be used as the printing originals. The stereoscopic photos can be obtained by photography and synthesis at the same time to make the bulb shine. They can also be obtained by using a multi lens stereo camera or a single lens plane camera with a positioning guide rail to take a group of plane images of the right scene of CFRP processed by diamond abrasive particles rotating ultrasonic vibration drilling, and then the negatives are obtained by the post optical projection synthesis method. Software synthesis manuscript is the current mainstream method. Professional technology and software are used to decompose and compress multiple planar images into stripes, and the stripes from different images are alternately arranged and combined in the order of left and right scenes. Each combination corresponds to the width of each lens. The vertical image production software can automatically process the arrangement process

the quality of stereoscopic printing has a significant impact on the intuitive effect of stereoscopic pictures. The printing method selected for stereoscopic printing should meet the requirements of not losing stereoscopic sense due to printing, good overprint accuracy, and suitable for mass printing. The stereoscopic printing process is roughly the same as that of general printing, but due to the focusing and blocking effect of the grating, it is required to have clear lines, accurate overprinting, and the chromatic error is required to be within 0.02mm, otherwise, the clarity and stereoscopic sense of the image will be affected

the fitting and forming of cylindrical grating plate and printed matter is the last key process of three-dimensional printing, which requires that the grating line and the grating line on the printed matter should be accurately aligned to show the three-dimensional effect. Before the cylindrical lens is compounded, a cylindrical lens female template must be made according to the parameters in advance, and then laminated while forming. It is required that the convex part of the grating mold, that is, the concave part of the grating plate, must be sharp, and the concave part of the mold should be close to the spherical surface, flat and smooth. The fitting methods of grating plates include flat pressing method, roller pasting method and post pasting method. The cylindrical lens negative film made by the flat pressing method has good reproducibility and high replication quality, which is mainly suitable for medium and small batch production; The cylindrical lens forming method with roller fitting has high production efficiency and is suitable for mass production, but compared with the flat pressing method, the reproducibility of the negative film is slightly poor; The latter method is generally used in the occasions where the cylindrical lens is large and thick, but the cost is high, and it needs a lot of pressure to make a three-dimensional print

grating direct printing is a relatively advanced stereo printing process at present. The process different from the traditional stereo printing method lies in the printing step. Grating direct printing adopts the method of direct printing on the back of grating. Therefore, a special alignment system must be adopted to make the stripes on the printing plate accurately correspond to the grating stripes on the sheet, which requires the printing machine to have high overprint accuracy and side gauge control accuracy, The printing thickness of the printing machine should also be larger. If UV ink is used for printing, UV curing assembly should be considered. In addition, the post press processing technology mainly includes die-cutting, film coating or back coating of printed matter. Back coating processing is to coat a layer of transparent paint or white paint on the back of the printed grating, which can improve the brightness of the image, make the image clearer and hierarchical, and effectively prevent the ink from fading or falling off

extension of stereoscopic printing

stereoscopic change printing is an extension of ordinary stereoscopic printing. As long as the observation angle is changed, it can produce a dynamic change effect. The original of the stereoscopic painting product comes from the stereoscopic shooting or synthesis of a group of related entities. Several combined dislocation images corresponding to the width of each lens are printed on the focal plane of the grating lens in sequence. Head up stereoscopic printing products, two eyes see the same image. To change the picture, one of the people's viewpoints or pictures must move. When the angle between the eyes and the grating will change, we will see one continuous image after another, that is, we will see an animation or the effect of changing the picture. When the grating line is in the vertical direction, the effect of changing picture is generally produced by the displacement of human viewpoint (called horizontal changing picture); When the grating line is horizontal, the picture is generally moved up and down to achieve the effect of changing the picture (called vertical changing the picture). The production method of stereoscopic change printing is basically the same as that of ordinary stereoscopic printing, but the color, lightness, contrast, saturation and other factors of the original image material will affect the viewing effect of the change painting after output

stereoscopic printing technology requirements

stereoscopic printing is more stringent than ordinary printing, and also requires higher accuracy. In the collection of originals, the camera is required to have high accuracy and record the picture clearly and accurately; In plate making, it is required to have high accuracy of color separation, hanging and copying, so as to ensure that the scene image maintains a rich level; The grating spacing and angle have high accuracy, and the compound molding requires accurate positioning. The printing paper is required to be tight, smooth, flat and with small flexibility. Usually, coated paper or paperboard is used. Grating materials mainly include hard plastic solid grating and soft plastic solid grating. Hard plastic solid grating has good stability, high image quality, not easy to deform, not easy to yellowing and discoloration, and its yield is also high. Soft plastic three-dimensional grating is rarely used because it contains PVC, which is not conducive to environmental protection, and its accuracy and stability are not enough. Stereo printing ink is not foaming ink. Any visible foaming will affect the clarity and three-dimensional effect. The three-dimensional three-dimensional printing ink has the same elasticity as the standard plastic ink, and the three-dimensional printing image is bright Adjust the scope of the oscilloscope to make the signal display on the full screen as much as possible (display the signal to be tested on the full screen as far as possible: 1. It is convenient to inspect the local details of the signal, the edges are clear, and the ink wall is smooth. The function of the adhesive is to make the printed matter and the grating piece stick together firmly, and to protect the ink layer from discoloration at high temperature.

the current situation and future of stereoscopic printing brush

stereoscopic printing is widely used in packaging and decoration, such as the outer packaging box and container cover of high-grade food or cosmetics Superior and many other aspects. Stereoscopic printing can not only beautify products, but also have a very good anti-counterfeiting effect. The anti-counterfeiting trademark of stereoscopic printing is encrypted by optical refraction data, which cannot be reproduced on the electronic color separation machine like ordinary printed matter. The comprehensive anti-counterfeiting method using optical encryption has changed the previous situation of single anti-counterfeiting technology and poor effect. Stereoscopic printing will play an important role in the anti-counterfeiting marks of cigarette and alcohol, beverages, cosmetics, clothing, drugs and other product packaging. Relevant experts predict that within a few years, stereoscopic trademarks will inevitably become the main anti-counterfeiting method, and its market prospect is very broad. However, due to the complexity of the technology involved in stereoscopic printing, the development of stereoscopic printing has been technically limited, and at present, our country is also in the primary stage. However, the simplification of image processing of stereo printing, the application of advanced cylindrical grating and 3D image synthesis software, the continuous deepening of CTP direct plate making and frequency modulation, the simplification of grating direct printing process, the development of laser holographic stereo printing technology, and the development of these new technologies make us have reason to believe that stereo printing will receive more and more attention, and its own development is bound to enter a new era

source of information: printed in China

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