Interpretation of the hottest platform output mach

2022-08-24
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Platform output machine - interpret the non mainstream output mode of CTP

when you see the title, you may ask: what is the mainstream output mode of CTP? The mainstream output machine can be divided into inner roller machine and outer roller machine, so the platform is non mainstream; The mainstream light for plate imaging includes visible light such as red light, green light, blue violet light, and invisible light such as 830nm, 1064nm infrared light. Others are non mainstream ways

1. Non mainstream of thermal sensitivity

there are many non mainstream output modes in terms of thermal sensitivity, including: a must be preheated before printing, B phase change non washing, C thermal non horizontal printing. The mainstream mode is thermal direct printing, and non preheating direct printing is the way to pick up the thermal flag

thermal non mainstream output mode (a)

must be preheated before printing mode

thermal must be preheated mode, which was originally the mainstream of CTP printing plate with enhanced competitiveness. However, because it must be heated after photosensitization and before entering the printing plate, the heat sensitive part can act on the photosensitive layer, and the surface to the bottom layer catalyzes to form a chain reaction, completing the complete bridge resin bonding of the image part from top to bottom

this method seems a little out of date, moving from the mainstream to the non mainstream format, but its biggest advantage is the negative exposure, which is a natural way to form images only when there are photosensitive parts. Therefore, it is still used in long version commercial and newspaper rotary lithography machines. It can only expose the image forming part, and the plate mouth and tail are areas that do not need to be exposed, so the area is small and the speed is fast. In addition, The negative thermal plate can produce image hardening by baking and re exposure, which can reduce the printing capacity. It can print 200000 sub plates in long-term printing. If it is baked, it can increase the printing resistance by 400000 copies, which has a positive effect on a large number of publishing and newspaper industry. Although it is troublesome, and the heating conditions will also affect the tone and point reproduction, the requirements of 1200dpi newspapers are slightly increased, and the impact is not great. Therefore, the old method of heating and then washing after thermal sensing, although not the mainstream thermal sensing version, will continue to be used for a long time in this regard because of negative film photosensitivity and printing resistance (2) a newly developed material used for thermal insulation mortar plastering exterior walls

thermal non mainstream output mode (b)

phase change impact free thermal version

phase change impact free thermal version, published by Asahi Kasei, Japan, mainly depends on the thermal layer coated on the page. It is usually hydrophilic, but after thermal exposure, the coating layer is lipophilic in the image part, and making the ink fall in the lipophilic image part, which is a unique way in the impact free thermal version. Whether it can be commercialized and listed in the future remains to be seen, However, if it can be used, it will be the best plate of the water di machine for plate making on the machine, because there is no falling off and debris

thermal non mainstream output mode (c)

thermal non horizontal printing plate

thermal non horizontal printing plate, most of which uses the infrared thermal energy of the laser to make the adhesive layer of the non horizontal printing plate fall off and become the image part that can stick to the ink. At present, pressek in the United States and Toray in Japan are the main two, but pressek is still the main plate for di. Although the technology is quite mature, the plate cost has not decreased, Therefore, it cannot be greatly expanded to form a non mainstream CTP plate in a special field

2. The non mainstream UV and general PS version

uses the CTP method of UV and general PS version, so this event is not the reason for the change of name. The UV setter of German bass print company has the most important selling point that the working environment is very open, just like the printing room. The second is to find a higher sensitivity PS version of the plate. The third is that the machine is exposed by moving the XY axis without any rotating components, which is easier to maintain. The biggest feature is the blocky reflector, which contains many small masking mechanisms to form the core of resolution and control. It is still suitable for the negative version of the image, because it can make accurate exposure in the image area, and no image part moves quickly or does not pass through, so as to save exposure time. This advanced concept uses traditional materials, which should save costs, but the price of the machine is not cheap. At present, few people buy it, so it is still developing in non mainstream fields

3. Non mainstream thermal ribbon imaging

CTP for thermal ribbon imaging is currently only used by Roland DICOweb. I believe that other manufacturers will also use this reusable, light-free, heat sensitive layer coating material, which only uses heat sensitive image forming belt. This can reduce consumables and is also very beneficial to environmental protection, but efforts need to be made to improve the print resistance

4. Non mainstream platform type photosensitivity

small-size CTP, mostly adopts platform type photosensitivity, but it is different from the way in which the XY axis of the block light source described in Item 3 moves, but the printing plate moves in the X axis, the light source does linear scanning from one side to the other side in the Y axis, and forms a light sensitive surface with the movement of the X axis. Some adopt rotating lens to move, some adopt different exposure in multiple light speed sections, and there are few moving elements

5. Non mainstream inkjet imaging

there are two methods of inkjet CTP: one is to directly spray oily ink on the blank printing plate for imaging, which is cheap and easy, with a printing capacity of 10000 or 20000 copies; The other is the shading method sprayed on the positive PS plate, which is mainly negative free, but the image still needs to be exposed and developed again after spraying. All printing conditions are like those of the traditional PS plate. If the ink is sprayed at 600dpi, it can only do rough work, and it is very useful to use more than 1200x1200dpi. If the ink dot reaches 1800dpi, it is very fine and usable, which is a cheap CTP method with development potential in the future

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