Why does the CTP of the violet laser source get the attention of so many users?
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Since the official launch of the laser source of Ziguang in May 2000, it has been considered that the most advanced thermal light source in CTP equipment has been severely challenged. Many users have found that this new light source has many advantages from a practical perspective. With this new technology, why can the purple laser get the attention of so many users? The following are some technical analyses.
Faster
The so-called purple light source is a laser with a 400 nm spectrum, and the shorter the physical characteristic spectrum, the greater the energy of the light, so the purple light source is relatively similar to other commonly used CTP light sources such as green light (532 nm) and red light (830 or 1064 nm). The ability to have higher imaging speeds is based on the fact that the laser can stay on the plate for a shorter period of time and provide enough energy to stimulate the reaction of the film on the plate. With this feature, equipment manufacturers can increase the speed of scanning. For example, the scanning speed of infrared laser is 20,000 lines/min, the scanning speed of green laser is 37,500 lines/min, and the scanning speed of violet laser can reach 55,000 lines/ This is equivalent to a 1,024 x 800mm folio scan at 2,400 dpi in 1 minute and 46 seconds (other operating hours are not included).
Higher precision
Also because of the physical characteristics, another feature of the shorter spectrum is that the laser spot will be finer, so it is allowed to scan finer dots on the plate. With the previous light source, it can only display 200lpi on the photosensitive plate. (1-99%) of the dots, and the use of a violet laser can increase the accuracy to 250 lpi.
More convenient operating environment
Since the digital plate used with the violet laser does not work for red and green light, the violet laser CTP device can use a yellow safety light (red light + green light = yellow light) for the operator to provide A brighter darkroom environment makes operation easier.
Longer life and cheaper cost
Although the laser manufacturer's maintenance period for the violet laser is the same as that of the previous green laser, it is also 3,000 hours. However, because the operating characteristic of the violet laser is that the laser only needs to be activated when it is actually imaged, it will not be used for the rest of the time. The life of the laser is lost, and the operation mode of other lasers is to start the laser at the same time after the machine is turned on, causing unnecessary loss to the laser. Therefore, the actual life of the violet laser is longer than other CtP laser sources. At the same time, because similar lasers are also widely used in other industries (such as the commonly used DVD drive), they can be mass-produced to reduce costs due to the large amount of users, making the price of this light source lower than other CtP laser sources.
Through the above features, it is not difficult to understand why the purple laser technology can shake the thermal technology. In fact, CtP technology is still developing rapidly. I believe that new technologies will continue to be launched in the future, but in the long run, Manufacturers have come to understand that the final development of thermal technology is near-rinse technology, which can further reduce one process to make the production effect more stable, and more importantly, avoid manufacturing syrup waste to meet environmental protection needs. However, in the short to medium term, in addition to Agfa's Galileo Talant thermal plate-making machine, which has a no-rinse heat-sensitive function, the so-called thermal products of other manufacturers still need a flushing procedure, which fails to achieve the thermal sensitivity. best effect. If the advantages of the above-mentioned violet light technology are compared with the general heat-sensitive products (the heat-sensitive technology that needs to be washed), the heat sensitivity is slightly superior in accuracy (but only 250lpi and 300 lpi respectively), and other aspects are not seen. What are the advantages? Conversely, the above-mentioned no-rinse thermal technology is more than 40% more expensive than photosensitive products in terms of equipment and materials. At present, not all users are willing to invest in this state-of-the-art technology in one step. Therefore, considering the current practical point of view, if the production requirement is within 250,000 impressions and the accuracy is less than 250 lpi, users will believe that the violet laser is an ideal choice.