What kind of light-sensitive material does laser photocopying use? What should pay attention to in the processing?

The use of photosensitive materials for laser photoprinting is generally full-color film, and is used more often in China by the "Huaguang" brand laser photo film. According to the requirements of the printing plate, the requirements of the film are that the word blackness is large and uniform, the strokes are clear, the background color is white and fog-free, there are no dirt spots on the film, there are no scratches on the film, and the blackness of the entire book film is the same. Therefore, we must first pay attention to the shelf life of the film in the flushing, and those who exceed the shelf life have a large degree of fog. Second, according to the film used to prepare the corresponding developer, in strict accordance with the order of preparation of their formulations, the developer should be clean, the development temperature can not be too high, it can not be too low (too high will produce fog, too low or too slow development Development time is too long, will increase the film base fog can not reach black level), the temperature is generally 25 ~ 35 °C. Finally, pay attention to the fixing, otherwise it will affect the film quality and save time. What are the highlights, midtones, and shadows? Brightness refers to the part of the original or printed matter that reflects relatively strong light and the colors are compared. The density value is between 0.2 and 0.6, and less than 0.2, it belongs to the highlight or extremely bright part. Slight adjustment refers to the part of the original or printed material that reflects relatively weak light and has a darker color. The density value is greater than 1.05. The midtone is the portion of the original or printed matter that is between the bright and dark shades, with a density value of 0.6 to 1.05.