The so-called screen printing industry direct computer printing platemaking technology.It is also called the Computer to Screen Computer imaging directly on screen, this technology and offset printing industry.The CTP is very similar.Constitutionally, the CTS system.The composition is similar to that of the pre-press picture and text information processing system, but no The equipment is quite different.

Graphic input section. Text input part is to digitize the original and input each Kind of digital file.Graphic processing and typesetting CTS, like DTP, use traditional images Processing software, graphics processing software and typesetting software, such as Photoshop, Llustrator, etc.

RIP Like offset printing, THE RIP of CTS is a variety of graphics text A PostScript file for interpretation, so that the network version of the output device CTS Screen printing computer direct printing plate – making Technology

Able to understand and control screen output device operation. CTS can also accept a variety of design software files and EPS and PS text And can convert these file information to component color version of the dot.

Proofing equipment Like offset printing, the CTS process also requires proofing before the official output Line layout check.

The proofing equipment can be ink-jet printer or special printer  The sample equipment. Output devices Screen output equipment is the focus of THE CTS is difficult, domestic CTS few One of the main reasons is that the screen output equipment price is too high and there is no domestic Corresponding production technology.

The working principle of output equipment basically has two kinds: one is laser exposure Optical equipment, through the laser light spot on the painted screen exposure hardening, and then display Shadow, so that no visible part of the mesh through. This output device has a higher output resolution.The other is the inkjet class An output device by which ink is sprayed with a high resistance to light Coated photosensitive glue on the screen, and then the whole page full exposure, resistance  The photosensitive glue covered by the light point is washed because no light is seen Drop, exposing the mesh.Its output resolution is relatively low at 300 ~ 600 dpi.

According to the specific working mode of CTS screen output equipment can be divided into Three types: thermal ink-jet system, ink-jet state transition system And laser exposure systems. Thermal inkjet system

The working principle of the thermal inkjet system is the same as that of the inkjet printer Richard.Screen output device uses ink to spread the image Light layer, and then the screen full exposure, development of the screen.

The ink is heated by a heating element in the nozzle to produce bubbles Extruded, so called thermal inkjet system. The heating element is opened or closed by computer control when required When a “point” is required, the heating element is heated to produce a bubble that squeezes ink out of its volume and squirts it toOn the screen.A row or matrix of nozzles shall be used on the nozzles, one Generally depends on the sprinkler to complete the screen version of the output.

Ink-jet state transition system The ink-jet state transition system uses piezoelectric nozzle for continuous spraying The ink begins as a solid wax ball and is then heated to Semi-solid state, sprayed onto the screen, ink contact screen version Immediately after drying, and then exposure development and other processes. The continuous spurt of ink does not all reach the screen, they It goes through a device called a charging switch, called a voltage plate.

The voltage plate can be caused to be sent out under the control of the computer Ink bead with static electricity, charged and uncharged ink bead through A continuous electrostatic field, uncharged can pass without hindrance Electrostatic field to the substrate screen, charging the ink droplets in The deflection caused by the electrostatic field is recollected.

The advantage of both ink-jet systems is that no vacuum is required Gas device, traditional screen printing plate – making method in the vacuum device Is required to keep the film and screen sensitive layer close

Then to reduce the image loss, and more importantly, the plate can be made To the net version of the full exposure and do not have to worry about loss details. The key to both systems is that the ink must be sufficient

The density of UV light to block exposure behind.In addition the Both inkjet systems can use traditional screen printing platemaking The photosensitive glue and the exposure equipment, and can realize the nozzle clear

Wash, cartridge supplement automation. But hot ink – jet liquid ink is easy to splash and ink – jet State – changing ink solidifies quickly without spatter Phenomenon.

Laser exposure system The output device of the laser exposure system is actually a laser head The light column is exposed and the screen is treated as film.The IP The difference between an optical exposure system and an inkjet system is that the laser system enables Use laser instead of ink, so it does not need the full exposure behind Light steps.

The key problem of the system is to have a sense suitable for the laser Light adhesive, can not use the traditional plate – making photosensitive adhesive.This is a Generally used in indirect screen printing plate – making process. Computer direct printing (spray wax) plate – making technology is the last few An ideal for large screen printing plate – making Technology, in screen printing direct platemaking technology, Switzerland JetScreen platemaking devices are typical.

JetScreen’s direct platemaking system breaks down The screen plate production model, completely abandon the film base plate, The graphic page is designed by using computer graphic information processing system

Etc., according to the screen printing plate requirements for color separation, screening, The output is then converted digitally. The JetScreen system comes with a very sophisticated The nozzle, its jet pixel resolution can be up to the highest 533 dpi x 633 dpi.Counterpoint repetition accuracy is up to 0.02mm, the number of screen lines up to 75 lines/inch.

In the ink-jet platemaking, drive the dedicated inkjet equipment, will The graphic information passes through a liquid melting with a high covering power Wax is sprayed onto a silk screen plate coated with a photosensitive emulsion The system of high optical density of hot melt wax, when the sprinkler image spraying To screen plate, hot – melt wax immediately set, and photosensitive emulsion It sticks.

Hot melt ink tasteless, even if the use of low – solid mold Plate material or low mesh screen can also achieve no overflow, Don’t spread.The smoother the surface of the template, the more effective the image The better the fruit, and the wax contains special ultraviolet light Blocking agent, thus can completely prevent exposure to uv radiation Shoot, avoid photosensitive film side wall light corrosion, and then in the screen A printing plate form text and text latent image, after direct exposure, development (development) that Screen printing plate can be obtained for screen printing. Dot forming can be arbitrary choice of round, square, diamond, oval network

Points.JetScreen eliminates the need for splicing film and completely solves magnification Film or screen due to the image distance, lens spherical aberration and other objective factors Dot deformation, virtual image and other difficult to overcome problems, effectively prevent the dot The enlargement ensures the fineness of the image’s fine level.Meanwhile, JetScreen mentions It provides an effective means to solve the moire in screen printing. No need for large screen printing CTP film base, its spray stencil The size ranges from 1800mm×2200mm to 3500mm×5200mm Range.