CTP plate in the printing and packaging process, has irreplaceable advantages, so the share of the printing industry is also increasing, so how should we buy from the wide variety of CTP plate on the market to be cost-effective and suitable for their own? Ltd. for the bosses to choose the CTP version of the 5 elements, I hope it can help the bosses!
① dot reproduction
Dot is the basis for printing and reproduction of visual information, the quality of the dot on the printing plate will directly affect the quality of the drop on the print. Therefore, the first step to controlling the bubble is to choose a good reproduction of the dot plate.
② Line reproduction
Line reproduction and dot reproduction, as the specific embodiment of the plate resolution test in printing. As the algorithm of line screening differs from that of dot screening, the dot highlights the optical properties of a specific area, while the line highlights the smoothness of the edges. Therefore, although the resolution is also tested, the testing of line reproduction is equally necessary.
③ Ink-friendly performance and wetting performance
The imaging condition of the plate is also very important. But the plate is ultimately used for printing, the plate's printability is also a very important aspect. Printing and printing plates are most closely related to water and ink, ink-friendly printing plates and printing plate wetting properties directly affect the printing ink balance and thus affect the quality of printing.
④Base ash
Bottom gray is the production of aluminum-based processing caused by improper, especially in the aluminum-based production of the upper volume and winding part of the most likely to appear bottom gray. Usually, the bottom ash can be removed by reasonable control of the development and exposure time, but the removal of the bottom ash should be under the premise of not affecting the quality of the graphic part if the removal of the bottom ash has to lose image quality as a precondition that the plate does not meet the requirements.
⑤ Sensitivity
Sensitivity refers to the CTP plate on the exposure of the light source energy requirements. This indicator is significant for thermal CTP plates, because the computer-directed plate-making machine laser light source is more expensive and difficult to replace, so the need to extend the service life of the light source as much as possible. The use of higher-sensitivity plates requires the laser to work with a higher power, accelerating the aging of the laser. At the same time, due to the high energy requirements of plate exposure, the laser is more likely to decay, further shortening its life. Therefore the lower the sensitivity the better.
The quality of the CTP plate will directly affect the quality of the finished print, so only with a good choice of suitable CTP plate, the quality of the product can be guaranteed. If you have other questions about paper product printing and packaging, please feel free to contact Henan Huida Print--All Technology Co.
Huida Print-All Technology company is an advanced and professional manufacturer of producing printing plates, mainly selling CTP, CTCP, and PS plates as well as offering ODM/OEMs, especially for the offset. For more information, please click the official website link here: https://www.huidaoffsetplate.com/.