1) Faster
Purple laser is a laser with a wavelength of 400nm. People with knowledge of physics know that the shorter the wavelength, the greater the energy of the light. Compared with other commonly used CTP light sources such as green light (532nm), and red light (830 or 1064nm), the purple light source certainly has higher energy. Using a purple laser light source, it stays on the plate for a shorter time and can also provide enough energy to stimulate the reaction of the drug film on the plate, so the imaging speed is also higher. Using this feature, equipment manufacturers can increase scanning speed. At present, the scanning speed of an infrared laser is 20000l/min, the scanning speed of a green laser is 37500l/min, and the scanning speed of a purple laser can be as high as 55000l/min, which is equivalent to completing a 1024mm x 800mm folio at 2400dpi in 1 minute and 46 seconds. Scanning of the version (other operating times are not included).
(2)Higher accuracy
Also from a physical perspective, the shorter the spectrum, the smaller the laser spot, so finer dots can be scanned on the plate. Using previous light sources, generally only 200lpi (1~99%) dots can be displayed on photosensitive plates, while using a purple laser can increase the accuracy to 250lpi.
(3) The operating environment is more convenient
Because the digital plate used with the purple laser does not react under red light or green light, the purple laser CTP equipment can use yellow light (red light + green light = yellow light) as a safety light, providing operators with more security. The bright operating environment makes operations more convenient.
(4)Longer life and cheaper cost
The maintenance period provided by laser manufacturers for violet laser light sources is the same as that of previous green lasers, which is also 3,000 hours. However, due to the operating characteristics of the purple laser: the laser is only started when it is actually forming an image, rather than starting the laser at the same time as other lasers, so its life loss is lower than other laser generators, which is why The actual life of violet laser products is longer than other CTP laser light sources.
Thermal CTP plates and other CTP plates have been in a synchronous growth trend. In May 2000, after the CTP product of the violet laser light source was officially launched on the market, CTP products, which have always been considered the most advanced thermal light source in CTP equipment, were severely affected. challenge.
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