Photosensitive Technology Overview of CTP Technology and Its Use Characteristics

(1) faster

Violet laser is a kind of laser with a wavelength of 400nm. People with physics knowledge all know that the shorter the wavelength, the greater the energy of light. Compared to other commonly used CTP light sources such as green light (532 nm) and red light (830 or 1064 nm), the purple light source certainly has higher energy. With a violet laser source, the time spent on the plate is shorter, and it can also provide enough energy to stimulate the reaction of the film on the plate, so the imaging speed is also higher. Using this feature, equipment manufacturers can increase the speed of scanning. At present, the infrared laser scanning speed is 20000l/min, the green laser is 37500l/min, and the violet laser can reach 55000l/min, equivalent to a 1024mm x 800mm finish in 2400dpi in 1 minute 46 seconds. Scanned version (not included in other operating hours).

(2) Higher accuracy

Also from a physics perspective, the shorter the spectrum, the smaller the laser spot, so that finer dots can be scanned on the plate. The use of conventional light sources can generally only exhibit 200 lpi (1 to 99%) dots on photo-sensitive plates, while the use of violet lasers can increase the accuracy to 250 lpi.

(3) Operating environment is more convenient

Because the digital plate used with the violet laser does not react under red light and green light, the violet laser CTP device can use the yellow light (red light + green light = yellow light) as a safety light, providing the operator with more Bright operating environment makes operation more convenient.

(4) Longer life and cheaper cost

The warranty period provided by the laser manufacturer to the violet laser source is the same as that of the conventional green laser, which is also 3,000 hours. However, due to the violet laser's operating characteristics, the laser only needs to be started when it is actually imaged, rather than being started at the same time as other lasers, the lifetime loss is lower than other laser generators, which is why The actual life of violet laser products is longer than other CTP laser sources.

The thermal CTP plate and other CTP plates have been growing at the same time, and by May 2000, after the CTP products of the violet laser source were officially put on the market, they were considered to be the most advanced thermal source CTP products in the CTP equipment. challenge.