Gravure printing craft
A gravure printing process, a technology of printing presses, applied in printing, post-processing of printing, printing devices, etc., can solve the problems of uneven inking, affecting printing quality, weak ink adhesion, etc.
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Embodiment 1
[0023] This embodiment is basically as attached figure 1 Shown: a gravure printing process, including the following steps:
[0024] (1) Equip the printing machine: set the screen line and needle angle of the plate roller, install the plate roller on the printing machine in sequence according to the color sequence, and then install the embossing roller, doctor blade and ink fountain to complete the equipment of the printing machine;
[0025] (2) Ink preparation: The ink includes the following materials in parts by mass: 25 parts of alkyd resin, 4 parts of epoxy resin, 17 parts of ethanol, 22 parts of isopropanol, 4 parts of wax slurry, 1 part of surfactant, acetyl lemon 3 parts of tributyl ester, 6 parts of triethanolamine, 2 parts of fungicide;
[0026] (3) Proofing: install the proofing film on the reel, clamp the end, fix the film roll, and wear the proofing film according to the route specified by the printing machine, and wind the film head on the installed winding mandre...
Embodiment 2
[0034] The difference between this embodiment and the embodiment is that step (2) ink preparation includes the following materials in parts by mass: 20 parts of alkyd resin, 3 parts of epoxy resin, 15 parts of ethanol, 18 parts of isopropanol, 3 parts of wax slurry 1 part, 1 part of surfactant, 1 part of acetyl tributyl citrate, 5 parts of triethanolamine, 1 part of fungicide. When the printing speed is 100-140m / min, the drying temperature in step (7) changes with the change of the graphic area, specifically when the graphic area is 0-20%, the drying temperature is 30-50°C, when The graphic area is 30-70%, and the drying temperature is 50-70°C. When the graphic area is 80-100%, the drying temperature is 60-80°C. The printing film is easily softened by heat and elongates under the action of tension. Therefore, the inventors have found through many tests that for different printing speeds and different image and text areas, the effect of using the above drying temperature is bet...
Embodiment 3
[0036] The difference between this embodiment and the embodiment is that step (2) ink preparation includes the following materials in parts by mass: 30 parts of alkyd resin, 5 parts of epoxy resin, 20 parts of ethanol, 25 parts of isopropanol, 5 parts of wax slurry 2 parts, 2 parts of surfactant, 5 parts of acetyl tributyl citrate, 8 parts of triethanolamine, 3 parts of fungicide. Further, when the printing speed is 140-160m / min, the drying temperature in step (7) changes with the area of the image and text, specifically when the area of the image and text is 0-20%, the drying temperature is 30-50°C , when the graphic area is 30-70%, the drying temperature is 50-70°C, when the graphic area is 80-100%, the drying temperature is 65-85°C. The printing film is easily softened by heat and elongated under the action of tension. Therefore, the inventors have found through many tests that for different printing speeds and different image and text areas, the above drying temperatur...
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