![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Classification of gravure plate-making technology
The gravure plate-making method can be divided into three types: â‘ manual etching plate-making. Including carbon quality corrosion plate making method and Bran corrosion plate making method. â‘¡ Electronic engraving plate-making method. â‘¢ Laser plate-making method. Including laser exposure etching method, laser etching film etching and laser direct engraving plate making method.
1. Manual etching plate making method
The manual etching plate-making method is to use hard charcoal to grind the flat copper plate. Lightly bake the plate on charcoal fire. Apply yellow wax. Brush evenly with a soft brush. After a few hours in the shade, stand by. On one side, first use cellophane to hook the cellophane. Draw half a layer of broken paper when hooked. Fill the paper texture with red powder. Then cover the paper with the paper. Rubbing on the back of the paper. Put it on the fire and bake a little. The red powder is all sticky. Cool again. Carve with a knife. Remove the wax according to the red powder. Move the knife slowly. After that, place the plate in a flat place. Pouring copper potion. After one or two hours, the copper will corrode deeply. Wash the potion. Wipe off the yellow wax. You can print.
2. Electronic engraving method
Compared with plate printing of relief printing, offset printing and flexographic printing. The electronic engraving gravure process is much simpler. The value corresponding to the gray value of the original image can be directly transmitted to the electronic engraving machine. Control the diamond carving needle to sculpt on the surface of the copper layer. The area and depth of the carved net can be changed. Electronic engraving can obtain high-quality gravure plate cylinder suitable for specific printing conditions (including printing press, ink, paper, etc.) by simply adjusting the tone curve.
Using gray value data to control the electric engraving needle can achieve precise matching with the gravure mesh tone image. Greatly improve the reliability of the process and the quality of the plate cylinder.
Unlike offset printing. In copying text and lines. The electronic engraving method can not achieve a finer copy than the number of engraving lines. The copy quality of text and lines is limited. In this regard. HELL has improved the dynamic control of electric engraving needles. Developed HQH software. Effectively eliminates the "serrated edges" of small yin and yang lines. usually. Gravure text is softer than offset printing.
Electronic engraving is widely used due to its simple process, high reliability, low cost, good quality, especially good image reproducibility. Compared with corrosion plate making. The only disadvantage of electronic engraving is the poor outline. In the field of packaging and printing, in addition to electronic engraving gravure. The application of the corroded version is also relatively common. Even if the laser-etched digital imaging method is used instead of the traditional film imaging, the depth of the mesh hole cannot be controlled during imaging, which limits the reproduction of mesh-tuned products to a certain extent.
In view of this situation. HELL's goal is to solve the problem of the sharpness of the outline of electronically engraved text and lines. This goal is achieved through the development of electronic engraving gravure technology and laser direct engraving copper layer technology.
3. Laser Plate Making
Carved with short-wavelength laser pulses, the resulting tone is not soft and delicate. Carving directly on the metal layer also involves the sensitivity of the metal layer to the laser. Small changes in the sensitivity of the metal to the laser beam all have an effect on the energy threshold. Since only the pulse energy above the threshold can generate a net hole, a change in the energy threshold affects the size of the net hole. If the energy density of the laser beam focusing fluctuates, it will also cause changes in the size of the cell. The above two static changes will cause the size deviation of the cell. If this change occurs simultaneously. Will definitely lead to greater deviation. Because the laser beam is focused through the glass lens. Only one fixed imaging area can be provided for the device domain of the shaftless transmission technology of the gravure printing machine. This leaves the laser beam with a fixed diameter. One way to increase the stability of the engraving and improve the resolution of the zinc layer is to form a grid with several small cells. The resulting hexagonal grid can accommodate 7 relatively small independent cells, but this method greatly reduces the engraving speed.
Other plate-making technologies include traditional photogravure plate-making technology and photo-screening plate-making technology.
Highlights of gravure platemaking technology and market development
1. Gravure plate-making technology
â‘ Ultra-fine carving technology uses different resolutions for text and images. The reproduction of characters and lines has reached a very high precision.
â‘¡The birth of laser direct plate-making technology makes gravure plate-making easier, more casual, and more effective in producing high-definition edge effects (especially for small text), while eliminating the need for chemical corrosion and other processes that are not easy to control manually.
â‘¢The increase of the speed of the electric engraving machine and the stable control in the aspects of drum preparation, technological process and digital proofing have greatly shortened the cycle of electric engraving and plate making. This also makes gravure printing more competitive.
â‘£ The birth of multi-channel engraving technology makes the gravure platemaking technology more reliable and timely. And more competitive price.
⑤ The environmentally friendly water-based ink for gravure printing and online processing {die cutting, bronzing, etc.) make gravure printing highly competitive in packaging printing. For these reasons. Since 2002, the global gravure market share has rebounded and increased.
2. New highlights in the gravure platemaking market
â‘ Full automation
The whole plate making process realizes automatic adjustment, automatic management and automatic monitoring.
â‘¡Diversification of plate-making business
While doing a good job in the main business, gravure plate-making also developed the decorative field, such as the size of the roller can reach 2.1 meters. Special scanning technology 6-5 scanning technology.
â‘¢Digitalization of plate making process
Digitization of the plate-making process: Fully digital link and management between production design and customers.
Because the customers facing gravure are world-class large companies. So the plate-making and printing companies that serve the development of globalization must also achieve globalization. In order to better serve its customers.
Conclusion
Because the cycle of gravure plate making is long. And require timely supply. Therefore, the service distance of gravure platemaking generally does not exceed 200 to 300 kilometers. Only so. Only in this way can we provide customers with more timely and better services. New technologies and new developments prove and foresee that gravure platemaking and printing will have a bright future!
â‘ N95 standard is one of nine protection level which edited and certificated by NIOSH(National Institute for Occupational Safety and Health) for particulate respirators.
â‘¡ Only the respirators/mask meet N95 standard and certified by NIOSH can be called NIOSH N95 Mask.
â‘¢ "N"means used for against particulate aerosols free of oil.
â‘£ "95"means it filters at least 95% of the particles at aparticle size of 0.3 micron.
N95 Face Mask,Nonwoven Face Mask,N95 Respirator Masks,Medical Protective Mask
Ningbo superclean environmental technology co.,ltd , https://www.supercleanmedical.com