The UV-Setter-710HS uses two UV light sources and scans the PS plate at the same time through a digital LCD panel. The scanning speed is greatly improved. The working principle of this kind of system is similar to the traditional serial dryer. The difference is that the pattern of the digital painting board is controlled by the computer digital signal, so that the digital scanning modulation of the UV light source can be realized, and the traditional PS version can be used in the original CTP application. Become reality. However, the scanning resolution of such a system is directly affected by the size of the microelectrode (electrode integration) of the liquid crystal panel. And it requires a very high scan control accuracy.
Ink-jet printing uses mechanical force to eject ink from small nozzles (typically 30-50μm in diameter) to form ink droplets. After the ink droplets reach the receptors, the ink droplets can be imprinted. Different color inks (yellow green and black) can be used to print color prints that can be obtained on the same receiving medium. The ink-jet printing ink droplet ejection status/printing status (On, Off) is completely controlled by a computer instruction and is a typical non-pact printing and plateless printing. Therefore, a digital printer operating on this principle has the characteristics of non-contact and non-printing, and can be printed on substrates of different thicknesses and different shapes (planar or curved). The ink jet printing ink droplet generation speed is generally 10-10 drops/second, which is a kind of high speed printing method. The quality of inkjet printing depends not only on the inkjet printing device and the ink properties used, ie the use of special substrates. For a long time, the low resolution of the inkjet printing system, the clogging of nozzles and the inability to print on ordinary substrates have been obstacles to the widespread use of inkjet printing technology. At present, these problems have been initially solved, and there are inkjet printing systems that can print on ordinary substrates, with resolutions of hundreds or even over 1,000 dpi. These technological advances have expanded the scope of application of inkjet printing technology, and laid the foundation for its application in digital printing.
A direct plate-making system based on ink-jet printing utilizes the principle of ink-jet printing to directly eject ink droplets onto the surface of hydrophilic substrates (such as aluminum plates with surface and anodized surfaces) to form a lipophilic printing area. (area with ink drop images) and hydrophilic non-printing areas (base plate surface without ink drop images). This system is characterized by a simple system structure, excellent operating performance, and does not require post-processing: The disadvantage is that the resolution is directly limited by the size of the ink nozzle, and it is still unable to do a high level of management. The CTPlate technology using inkjet printing is not a new invention. As early as at the German DRUPA exhibition in 1995, Polychrome exhibited a similar CTP system. The system on display at that time used a conventional inkjet printing method to print an ink drop image on a positive-printing PS plate of the system, and then performed a full UV exposure on the PS plate with ink drop images. The PS photosensitive layer on the plate with ink drop protection is not exposed to ultraviolet light, and it is still unsatisfactory, but the PS photosensitive layer without ink drop image protection becomes soluble under the action of ultraviolet light. Finally, the same printing plate as the conventional plate making method can be obtained by conventional PS plate development. However, the Solid Inkjet technology used in this year's system is directly imaged on a hydrophilic substrate, and can be printed immediately after imaging, without any post-processing. Solid ink jet technology uses a solventless ink that is solid at room temperature and liquid at the working temperature of the jet (eg, 100° C.). Such an ink comes into contact with the surface (high temperature) of the master substrate, and becomes solid due to a change in temperature, and firmly adheres to the surface of the master substrate, becoming an image area of ​​the printing plate. The current issue is how to increase the resolution of this approach to meet the needs of commercial printing. It should be said that this imaging method without any post-processing is more suitable for CTPress applications.
Purple Laser CTP Technology Purple Laser CTP technology consists of a violet laser CTP platemaking system and a CTP plate that can be used for violet lasers. In the case of a platemaking system, the core is a laser diode capable of generating a violet laser of 400-410 nm.
People love violet laser for the following reasons:
1. Economical Because it has a relatively short wavelength (around 405nm), it is easier to avoid divergence of light than the current wavelength of 830nm, so it can realize long-distance transmission with a compact structure, that is, an inexpensive semiconductor laser can be realized. For the inner drum CTP plate making machine, the manufacturing cost of the CTP plate making machine is reduced, and it is convenient to correspond to the output of plates of different sizes and different weights; in addition, due to the fact that the turning mirror is kept very small and light, High-speed scanning can be realized, which improves the production efficiency of the CTP in-feed platemaking machine.
2. Close to the operation of the bright room 3. The design of the plate becomes easy The present situation is that the power of the UV diode is relatively low, generally 5mW, so the sensitivity of the plate is required to be higher, that is, it should be ≤ 20μJ/cm2. Silver salt diffusion version and photosensitive giant version pass.
The real potential of UV lasers is the appearance of diodes with larger power (eg, 30-50 mW) and wavelengths moving in the short-wave direction (eg, 350-380 nm). That will threaten all current forms of CTP technology, and of course it will also be the biggest opportunity for media producers.
In order to understand the requirements of the sensitivity of the laser to the plate material, the sensitivity of the commonly used photosensitive materials is listed as follows:
1 silver halide film μJ/cm2
2 silver edition (Silver salt diffusion, composite version) μJ/cm2
*3 Purple Laser Edition LV-2 (Mitsubishi) 10 μJ/cm2
*4 Purple Laser Edition (Fuji) 60μJ/cm2
5 high sensitivity photosensitive resin 100-200μJ/cm2
6 thermal plate 150mj/cm2
7 regular PS version 200-400mj/cm2
* Asterisk is the purple laser CTP plate that was introduced at the Drupa exhibition. (To be continued)
Ink-jet printing uses mechanical force to eject ink from small nozzles (typically 30-50μm in diameter) to form ink droplets. After the ink droplets reach the receptors, the ink droplets can be imprinted. Different color inks (yellow green and black) can be used to print color prints that can be obtained on the same receiving medium. The ink-jet printing ink droplet ejection status/printing status (On, Off) is completely controlled by a computer instruction and is a typical non-pact printing and plateless printing. Therefore, a digital printer operating on this principle has the characteristics of non-contact and non-printing, and can be printed on substrates of different thicknesses and different shapes (planar or curved). The ink jet printing ink droplet generation speed is generally 10-10 drops/second, which is a kind of high speed printing method. The quality of inkjet printing depends not only on the inkjet printing device and the ink properties used, ie the use of special substrates. For a long time, the low resolution of the inkjet printing system, the clogging of nozzles and the inability to print on ordinary substrates have been obstacles to the widespread use of inkjet printing technology. At present, these problems have been initially solved, and there are inkjet printing systems that can print on ordinary substrates, with resolutions of hundreds or even over 1,000 dpi. These technological advances have expanded the scope of application of inkjet printing technology, and laid the foundation for its application in digital printing.
A direct plate-making system based on ink-jet printing utilizes the principle of ink-jet printing to directly eject ink droplets onto the surface of hydrophilic substrates (such as aluminum plates with surface and anodized surfaces) to form a lipophilic printing area. (area with ink drop images) and hydrophilic non-printing areas (base plate surface without ink drop images). This system is characterized by a simple system structure, excellent operating performance, and does not require post-processing: The disadvantage is that the resolution is directly limited by the size of the ink nozzle, and it is still unable to do a high level of management. The CTPlate technology using inkjet printing is not a new invention. As early as at the German DRUPA exhibition in 1995, Polychrome exhibited a similar CTP system. The system on display at that time used a conventional inkjet printing method to print an ink drop image on a positive-printing PS plate of the system, and then performed a full UV exposure on the PS plate with ink drop images. The PS photosensitive layer on the plate with ink drop protection is not exposed to ultraviolet light, and it is still unsatisfactory, but the PS photosensitive layer without ink drop image protection becomes soluble under the action of ultraviolet light. Finally, the same printing plate as the conventional plate making method can be obtained by conventional PS plate development. However, the Solid Inkjet technology used in this year's system is directly imaged on a hydrophilic substrate, and can be printed immediately after imaging, without any post-processing. Solid ink jet technology uses a solventless ink that is solid at room temperature and liquid at the working temperature of the jet (eg, 100° C.). Such an ink comes into contact with the surface (high temperature) of the master substrate, and becomes solid due to a change in temperature, and firmly adheres to the surface of the master substrate, becoming an image area of ​​the printing plate. The current issue is how to increase the resolution of this approach to meet the needs of commercial printing. It should be said that this imaging method without any post-processing is more suitable for CTPress applications.
Purple Laser CTP Technology Purple Laser CTP technology consists of a violet laser CTP platemaking system and a CTP plate that can be used for violet lasers. In the case of a platemaking system, the core is a laser diode capable of generating a violet laser of 400-410 nm.
People love violet laser for the following reasons:
1. Economical Because it has a relatively short wavelength (around 405nm), it is easier to avoid divergence of light than the current wavelength of 830nm, so it can realize long-distance transmission with a compact structure, that is, an inexpensive semiconductor laser can be realized. For the inner drum CTP plate making machine, the manufacturing cost of the CTP plate making machine is reduced, and it is convenient to correspond to the output of plates of different sizes and different weights; in addition, due to the fact that the turning mirror is kept very small and light, High-speed scanning can be realized, which improves the production efficiency of the CTP in-feed platemaking machine.
2. Close to the operation of the bright room 3. The design of the plate becomes easy The present situation is that the power of the UV diode is relatively low, generally 5mW, so the sensitivity of the plate is required to be higher, that is, it should be ≤ 20μJ/cm2. Silver salt diffusion version and photosensitive giant version pass.
The real potential of UV lasers is the appearance of diodes with larger power (eg, 30-50 mW) and wavelengths moving in the short-wave direction (eg, 350-380 nm). That will threaten all current forms of CTP technology, and of course it will also be the biggest opportunity for media producers.
In order to understand the requirements of the sensitivity of the laser to the plate material, the sensitivity of the commonly used photosensitive materials is listed as follows:
1 silver halide film μJ/cm2
2 silver edition (Silver salt diffusion, composite version) μJ/cm2
*3 Purple Laser Edition LV-2 (Mitsubishi) 10 μJ/cm2
*4 Purple Laser Edition (Fuji) 60μJ/cm2
5 high sensitivity photosensitive resin 100-200μJ/cm2
6 thermal plate 150mj/cm2
7 regular PS version 200-400mj/cm2
* Asterisk is the purple laser CTP plate that was introduced at the Drupa exhibition. (To be continued)
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