Label Prepress Processing
Label Prepress processing
The wide application of labels and the continuous development of label varieties naturally promote the development of label printing technology. Label printing covers the flat, convex, concave, net and all printing methods, the application of different countries. However, from recent years, the development trend of global labels can be seen, flexible printing, narrow rotation printing, digital printing in Europe and the United States to become a new bright spot in label printing, label printing is also the development trend.
In the prepress processing, many customers design orders are offset or gravure-based way, this original if the use of flexible printing, proofs will appear a lot of quality problems, such as the color is not in place, the level is not obvious, there hard Side and so on. Therefore, to solve such problems, timely communication with customers is very necessary.
A) Today's labels are printed with manual printing, there are a lot of monochrome or through the machine printing (which can improve production efficiency, the new development of a lot of label printing press overprint accuracy is not high, but improve the printing efficiency, printing quality to be improved.
Plate making process
Label printing covers several major printing methods in the plate making stage. According to the nature of different products, choose a different printing methods, for different printing methods, plate-making process is also different. In this paper, a flexible version of the plate making process as a brief introduction.
Flexible version of the plate making process: the original one film (film) a exposure of a washing a dry one after the treatment.
1. Original. Suitable for flexible printing of the original design should have the following characteristics: more than the number of colors. But the overlay less; does not require the reproduction of special small details; cable is not too high, but can achieve color printing effect; can be done online packaging processing.
2. Film (film). Meet the plate needs, graphic clarity, the size of the size of accurate specifications; with frosted film, requiring the four corners of the same density; the use of film positive words; with a transmission density meter, white density of 0.06 or less; black density of 3.5 or more.
3. Exposure includes back exposure and main exposure.
① back exposure. The support sheet of the photosensitive resin plate is upward and the protective film is tiled down in the exposure drawer for exposure. The ultraviolet light passes through the support film to cure the photosensitive adhesive layer. To establish a solid foundation, but also control the depth of washing version, to strengthen the support film and the photosensitive resin layer of the binding force. The back exposure time is determined according to the desired substrate thickness.
② main exposure. Also known as positive exposure, photosensitive resin plate support film down, protective film facing up. Tiled in the exposure drawer. The protective film will be torn off once, and then film film surface affixed to the photosensitive resin plate above. The vacuum film flat female 1 怎 孽 high yield * female A check method covered in the film (non-film vacuum, so that the film and the photosensitive resin layer close together. UV through the vacuum film and film translucent part of the plate so that the light Part of the polymerization and curing. The main exposure time is determined by the plate model and the intensity of the light source. Exposure time is too short will make the text slope is too straight, lines bent, small print, small part of the wash, If there is a large, small, thick, thin lines on the same plate, the exposure will be covered with black film, and the small part will not be lost due to flushing to ensure the quality of the plate.