Talk about the coverage of gift bags

  Dalian gift bag is not enough for remedial color printing. The image can be removed by flashing once or by putting a piece of paper to fill the spot, or directly using the flash light to flash white light to increase the depth of the original and make the image soft. Chemical. The pulp fibers of the base paper are all bleached chemical wood pulp, and the amount of the dough is increased to enhance the coverage of the mechanical pulp of the liner. The medium alkaline sizing process is adopted to reduce the amount of aluminum sulfate in the surface and increase the 13H value of the base paper.

  It has been proved by experiments that the pH value of the base paper layer is better between 6.5 and 8.0. Reduce the amount of fluorescent whitening agent and balance different chemical materials to achieve the desired hue. In order to reduce the yellowing of the coated whiteboard paper, the selection of the coloring pigment not only requires easy handling, good affinity, but also high lightfastness. Therefore, the use of high quality organic pigments, its performance in all aspects is ideal.

  More attention should be paid to the amount of coloring pigment, because the amount of too high or too low can not achieve the purpose of coloring. The adhesive part of the gift box is processed by surface coating, glazing, etc., the adhesive is difficult to penetrate the surface layer, penetrates into the paper, and the carton is difficult to stick; when stored and transported, it can be folded into a flat shape for storage and transportation; , open the box, and much smaller than the same volume of wooden box, plywood box.

  If combined with various coverings and moisture-proof materials, it can greatly expand the scope of use, such as moisture-proof corrugated packaging boxes can be packaged with fruits and vegetables; plastic-film covered can be packaged with moisture-absorbing materials; plastic film liners are used in boxes. A sealed package can be formed to package liquid, semi-fluid articles, and the like.

  For example, in the process of exposure, the scattering and diffuse reflection of light are different. The ordinary flexographic printing ink passes through the vacuum layer, the film base, the emulsion layer and the antihalation layer, and there are serious scattering and diffuse reflection problems. The coating of the digital flexo plate is very thin during exposure, so there is only weak scattering and diffuse reflection.