The hottest feeling purple laser CTP Technology 0

Feel purple laser CTP technology

after the computer direct plate making technology (CTP) entered China, its development has attracted more and more attention. At present, the field of CTP is still the coexistence of thermal sensitivity and violet laser technology, and the development of violet laser CTP is more remarkable. More and more companies have begun to invest in the research of this technology. They believe that violet laser CTP technology will play a decisive role in the future printing equipment market. So what is violet laser technology? 7. Why does it compete with thermal technology in the CTP market

1. The origin and development of violet laser

Nichia company in Japan was founded in 1998. It is the first company to successfully develop violet laser with wavelength between 391~420nm. Because the wavelength of violet laser is short and its laser spot is small, it can write more data in the storage medium with the same density with a better optical focusing lens. Because the wavelength of violet laser is close to the exposure wavelength of traditional PS version, some CTP equipment manufacturers also hope to transplant this technology to the printing industry. The first companies to launch violet laser CTP equipment are mainly Agfa and futu. As of the drupa exhibition in 2004, more than 10 companies have launched violet laser CTP equipment. Some plate production companies have also launched plates matching the equipment

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in addition, Sony, Panasonic, Sanyo, Toshiba, etc. in Japan are also involved in the development of violet laser generators. The report shows that the power of violet laser generator has been increased from 5MW to 60MW, and this development is far from the end

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2. Advantages of violet laser

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① high resolution

because the short wavelength produces small light spots, it can provide higher resolution, and the output resolution can reach 250 lines/inch

② small size and fast speed

due to the small laser spot produced by the short wavelength, the volume of the reflecting lens of the laser head can be reduced. The small volume of the laser head can increase the rotation speed. With the high sensitivity silver salt plate, the rotation speed of the laser head can be as high as 55000 rpm, which is equivalent to 4, 26 times of the sound speed, while the scanning speed of the infrared laser and the green laser are 20000 lines/min and 37500 lines/min respectively. Violet laser speed is very fast. A single laser beam can also produce 22 printing plates (1030mm) per hour × 800mm/2400dpi). It is the model with the highest output on the market at present

③ bright yellow safety light can be used

use the photosensitive material corresponding to the purple light source. It can be operated under the bright yellow safety light. It is more convenient to work near the open room

④ stable quality. Further improve the performance of inner drum models. The laser diode light source is stable and the laser spot is solid. It can generate high-quality spots and improve the printing quality. The inner drum model only uses a single laser, which accounts for a low total cost of CTP. However, the outer drum model is limited by the rotation speed of the plate cylinder and cannot further improve the production speed. Therefore, multiple laser beams are often used to make up for this defect. The cost of replacing CTP is relatively high. Therefore, the inner drum CTP on the market generally takes the lead in using violet laser

⑤ easy maintenance and rapid replacement

purple laser diode is small in size and highly modular, so it is easy to repair and replace, which can improve production efficiency

⑥ longer service life

some people often mistakenly believe that the service life of purple laser is short, but it is also misled by hydrogen laser, because the working principle of hydrogen laser is: when working, the laser tube is always on, and it needs a lot of starting energy to excite argon to generate laser. It cannot be switched on and off in the mode of circuit, but the laser point is controlled by the deflection of the constant light tube and lens, so the average service life is only about 2.5 years, and the effective production time is also very short

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the working principle of violet laser is that the diode consumes very little energy. When it is not working (when it is turned on but not exposed), the laser is not bright, effectively extending the life of the laser. The lifetime of violet laser diode is more than 3ooodx~, with 103 (HMU × Take 770mm plate as an example. If you produce 100 pieces per day and work 250 days a year, 3000 hours is equivalent to 3.5 years. The return on investment is not lower than that of infrared diode laser. Manufacturers do not need to replace the laser head every year. At present, some manufacturers claim that the service life of their purple laser generator can reach 10 years, which will bring greater profits to printing companies

some manufacturers only provide lasers and imaging heads to users who use purple laser CTP, while other larger equipment manufacturers have launched their own purple laser CTP. These devices have their own characteristics and compete in the CTP market

1. laser and imaging head

Nichia is the main manufacturer of purple laser diode. Some manufacturers tend to buy fully assembled imaging heads and install them on their own plate making machines. For example, tuiopics in Munich, Germany, supplies Barco, Krause and purge.esk with imaging heads for ofot plate making machines, a relatively complete automobile and core parts industry cluster integrating R & D, production, logistics, trade, etc. synectix produces purple laser imaging heads for small fd.yag plate making machines. The suppliers of violet laser modulator include latronics in Aachen, Germany, etc. Other CTP manufacturers such as Agfa, ECRM and escher.grad buy diodes to make their own light sensing heads and put them into the plate making machine. At present, the main development direction of energy conservation of existing building exterior walls in China is that the output power of some equipment is generally between 5 ~ 30MW. The lifetime of Nichia violet laser diode is 3000 hours, while that of internal experiment is more than 10000 hours

2. Purple laser plate making machine

from drupa2004, it can be seen that CTP is still the coexistence of thermal and purple laser technology, but purple laser CTP has developed rapidly. Some manufacturers that originally only produced thermal CTP have now launched purple laser CTP, and almost all manufacturers that originally produced visible CTP have launched purple laser CTP

with the development of purple laser technology, inner drum CTP has successfully launched a purple laser CTP with 30MW diode imaging on photopolymer plate, which greatly improves the plate making efficiency; The appearance of 60MW and 100MW purple laser diodes has extended the service life of laser diodes to 10000 hours, and the replacement cost of diodes has also decreased to less than 10000 euros

Fujifilm's luxeiv.6 inner drum quarto CTP adopts our company's brillialp. there is no need to add this kind of plastic additive NV photopolymer plate making. After baking, the printing resistance reaches 1million prints. The equipped laser diode has a service life of more than 5000 hours, with a maximum resolution of 3657dpi. 35 Quartos are output per hour below 1200dpi resolution, and 2O Quartos are output per hour below 2400dpi resolution. Agfa launched the upgraded polarisxtv.s and xcv.s purple laser CTP of po1aris. XTV is 25% faster than xcv and can make 260 plates (1016dpi) per hour

eight opening pateritemicra violet laser CTP and four opening flatrite2055vi violet laser CTP of Japanese screen. P1ateritemicra with 60MW diode can expose the violet laser photopolymerization plate, and the printing plate format is 250mm × 330mm-516mm × 580mm

esko.graphics has many semi-automatic and full-automatic violet laser CTPs with different formats, among which the new products are platedrive (rconnpact) and dpx4 polyester c11p plate making machine. Krause's LaserStar violet laser CTP can expose 250 photopolymer plates per hour. At the same time, it also launched a 100MW laser diode light source that can be used in any direct plate making machine. The service life of the diode light source is up to 10000 hours. The replacement cost is about 9900 euros

Heidelberg also launched prosetter violet laser CTP system, which has a new "on-demand plate making" "The function can integrate s-pa directly into the printing workshop. The printing operator only needs to select the required work on the touch screen and press the button, and then he can separate the color according to the required color through CTP equipment or start plate making according to the overall work requirements.

in the long run, the final development of heat sensitive technology is free; medium washing technology, every reduction of a process will make the production effect more stable. What's more important is to avoid liquid medicine waste, which is consistent with Meet the requirements of environmental protection. However, in the medium and short term, the thermal products of some manufacturers still need washing procedures, which cannot achieve the best effect of thermal sensitivity. Compared with violet laser technology, thermal products (referring to the thermal technology requiring washing) are slightly better in accuracy (but only the difference between 250 lines/inch and 300 lines/inch). At the same time, the price of washing free thermal technology in terms of equipment and materials is more than 40% higher than that of photosensitive products. Therefore, most users are reluctant to invest in this technology in one step. In addition, compared with thermal CTP system (plate making machine, plate), purple laser CTP is cheap, and the advantages of printing purple laser CTP plates and equipment in medium format (such as octave, quarto, folio and large folio) are gradually emerging. From a practical point of view, if the printing resistance is within 250000 prints and the accuracy is less than 250 lines/inch, I believe violet laser is an ideal choice

when investing in CTP, operators generally consider many factors, and the thermal CTP system is also constantly improving. Due to their irreplaceable advantages, thermal and violet lasers still coexist in the market to meet different needs of customers. In fact, there is no best CTP system, only the system that is most suitable for your business environment

reprinted from: Printed today