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What is the relationship between ink absorption and lithography?
The thickness of the lithographic printing ink is significantly thinner than the thickness of the relief printing ink film. Therefore, the ink absorption on the surface of the paper is very important for drying the ink and related problems. The conventional leaf-leaf lithography and letterpress printing inks are all dry oil systems. The ink is dried by solidification and oxidative polymerization. The ink must be solidified first to prevent transfer and inking. When some of the ink in the ink penetrates the surface of the paper, solidification occurs. The paint-containing fast-drying ink diluted with a low-viscosity oil, when the oil is attracted by the paper or paper coating layer, the ink polymer begins to solidify or gel. Even a small amount of media may transfer, which is invisible when no pigment is added to the paper, and then the fully cured ink film is dried by oxidation reverse polymerization, which takes about 2 to 4 hours. time. This kind of relationship should be carefully adjusted in order to prevent the printing ink from having anti-adhesiveness so that the paper has a high absorbency and the paper has a good ink receptivity and a low absorptivity of the ink gloss.