1. The pre-press design requirements for self-adhesive labels are as follows:
(1) Understand the technological route.
(2) In the application of colors, spot colors should be used to make up for the shortcomings of four-color printing, and the colors should be simple and clear.
(3) The bright tone of the same color and the field should be separately plate-making.
(4) The lines cannot be too thin, and the text cannot be too small.
(5) Emphasize the middle tone in the application of levels, and the level of highlights and dark tones should be flat.
(6) When printing and imposing labels, the direction of marking and the position of imposition labels should be considered.
2. Self-adhesive label printing of relief printing resin plate
Film production is typeset by computer, and laser phototypesetting machine is used for printing. Generally, negative pictures are used, and the positive pictures are seen. The density of the light-transmitting part of the film is less than 0.05, and the density of the shading part is greater than 3.0. The plate-making process is: exposure_exposure after washing, drying and exposure.
3. The printing of self-adhesive labels for flexographic resin plates
The flexible plate has the characteristics of high elasticity, high durability and high resolution. To make a high-quality plate, in addition to high-quality plate materials, high-quality plate-making technology and plate-making equipment are also required. At present, the better plate materials are the DuPont Cyrel version of the United States and the German BASF company, etc., which are composed of a polyester protective layer, a photosensitive resin layer, and a polyester support film. The photosensitive resin layer is attached to the polyester support film to ensure dimensional stability, and then covered with a polyester protective layer, the polyester protective layer and the polyester support film card protect the plate during handling, cutting and back exposure process Avoid damage.
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