PS version in the digital process (five)

CTcP, UV-LD lasers have been successfully studied in foreign countries so that the conventional PS plate can also be used as a CTP plate. This will greatly ease the difficulty of direct plate development and development, and will greatly promote the popularization of direct plate-making technology. In the early 1990s, a more mature violet laser source emerged. Not only the laser energy was relatively large, reaching several tens of μJ/cm2, but also the lifetime of the light source was relatively large, reaching 2,000 hours or even longer. Therefore, it appeared to be strong once it appeared. Development, and even at the 2000 Drupa exhibition in Germany, almost all CTP systems are equipped with a violet laser light source. With the maturation of violet laser technology, a newer CTP technology has emerged. Many people in the industry call it CTcP. It uses CTP technology to expose directly on conventional PS plates.
Features:
1. Ultraviolet light source, wavelength of 360-450nm; its spectrum is fully applicable to conventional PS plate, can use conventional negative, positive PS plate 2. No need to adjust the plate-making process 3. Can be a smooth conversion from the simulated prepress system, Adapting to the current CTP prepress network 4. With a fully automated media processing system 5. It can meet almost all printing tasks, whether it is newspapers, books or high-quality color printing.
Conventional UV-sensitive printing plates are cheap, after many years of verification has been very reliable, a high printing, high resistance to printing, compared with the use of expensive, newly developed laser-exposed plate, UV-Setter means prepress There is no need to change the system and media processing. Everything can be left as it is: high quality, low cost, and unchanged programs.
Most of the plates used in printing on the market can be exposed by UV-Setter. According to the characteristics of the media, it is best to use negative editions, which only need to be partially exposed. Because negative editions have only 50% of the image area on average, this saves valuable exposure time.
The New Development of Computer Direct Plate Making CTcP
For the first time in the world printing exhibition, the conventional PS version of the UV light source CTP system is at the Drupa 2000 exhibition, referred to as CTcP. It has two forms, one of which was first introduced by BasysPrint. Its working principle is as large as: ordinary UV light source, after the lens will be scattered light into parallel light, projected to the computer integrated chip DMD (Digital Micromirror Device), and DMD is controlled by computer digital image information, will change the image information Converted to reflective dots, image information is thus imaged on the plate. The core component of this CTP system is a computer-integrated chip (DMD) of about 4×3 from Texas Industrial Co., Ltd., USA. According to Basysprint, the technology should be used in a computer-to-plate system, which is the company's first. According to reports, at present, the dots formed by this plate-making method are square dots, and the points on the map are very neat.
2. Optical Fiber Exposure System The world's first optical fiber direct printing system is currently being exhibited by Drup-Eskofot on Drupa 2000 in the prototype machine format. It can be directly plated on an ordinary PS plate. System - Dicon. The system is a plane scan type, light source 2KW mercury lamp. It can expose and process 30-50 pages per hour. It can be negative or positive. The prepared version has been dried and punched, and can be directly printed on the machine. The principle is very similar to the scanner.
The Dicon system directs UV light from the UV lamp through a fiber optic to a series of LSAs, which combine to form an exposure grating that covers the maximum width of the media. Each shutter provides a 20um spot and is arranged with a 1um of light to display a light gate. The resolution of Dicon platemaking machine has 1270dpi and 2540dpi for user's choice. The plate size can be from 510mm x 400mm to 1125mm x 825mm, and the plate thickness is 0.15-0.4mm.
Baoluo Telford will launch semi-automatic and fully automatic models when the Dicon system is officially put on the market to meet the needs of different users. The Dicon system can operate in the bright room. After the printing plate is exposed, the built-in punching unit can punch holes on the plate according to the customer's needs and automatically send the plate to the line processor. The data that drives the Dicon platesetter comes from ProBio's NewAge RIP, and the digital proofing material can also be output on Dicon.
CTPP (Computer to Polyester Plate)
This type of media is based on a polyester film (0.1-0.4mm) in structure, principle, exposure method, and similar silver plate. Compared with general CTP plate, it has lower resistance (1-20000) and lower resolution (5 -95%), but its stability is good and its price is relatively cheap. Especially after a special plate material output machine (or a normal laser imagesetter) can be used, the plate making process becomes very fast (from the original 30 minutes to 8 minutes). Because of the use of printing presses, it was able to make great use of the printing force. Therefore, it was said that such printing plates will have a promising future in the printing field. At present, Japan's Mitsubishi Paper and Agfa have the largest output in the world.
At the FD-FB exhibited by Japan's Mitsubishi Paper at Drupa Exhibition, under the company's CTP technology solution environment, it is now possible to use a polyester film-based silver salt digital plate SDP (Siluve Digital Plate). ) Print the Color task, so a combination of these words appears. And Agfa Setprint exhibited by Agfa in Japan last year belongs to the CTPP plate. (Finish)