The factors affecting the quality of glazing include paper properties, temperature, ink, and crystallization of printed materials.
Paper Performance The effect of paper on gloss quality is mainly reflected in the effect of paper smoothness on gloss quality. Highly smooth paper is less effective after polishing, as it is almost completely absorbed by rough paper or paperboard. In order to solve this problem, you can dry up the cool prime before the last light, or twice the light.
Temperature glazing temperature between 18 ~ 20 °C, can achieve the best results. In winter, the varnish is easily solidified, and the surface film of the varnish product is uneven. In order to solve this problem, the coating oil needs to be stored in a warm place. If the temperature of the coating oil is too low, it must be properly diluted with a solvent.
Printing inks used for printing products after printing inks must be solvent-resistant and heat-resistant. Otherwise, the printed matter will be discolored or wrinkled. The solution is to pay attention to the following points when selecting inks for printing: 1 Use alcohol-resistant solvents, ester solvents, and acid-base inks. 2 It is recommended to use inks that are not discolored and have good gloss. 3 To choose an ink that has good adhesion to paper.
Crystallization of printed matter The phenomenon of crystallization is mainly due to the fact that the printed matter is left for too long, the area of ​​the ink at the bottom of the print is too large, and the dry oil is excessively discharged. The ink film will crystallize on the surface of the paper, which often causes the glazing Go up or produce "flower face", "rough spots" and other phenomena. In order to solve this problem, 5% lactic acid is generally added to the varnish and it can be used after stirring. The modified varnish is applied to the printed matter so that the vitrified film on the surface of the printed matter is damaged, and the varnish can be evenly applied to the surface of the printed matter to form a glossy film. (Text / Jin Yin He) ("Printing Weekly")
Paper Performance The effect of paper on gloss quality is mainly reflected in the effect of paper smoothness on gloss quality. Highly smooth paper is less effective after polishing, as it is almost completely absorbed by rough paper or paperboard. In order to solve this problem, you can dry up the cool prime before the last light, or twice the light.
Temperature glazing temperature between 18 ~ 20 °C, can achieve the best results. In winter, the varnish is easily solidified, and the surface film of the varnish product is uneven. In order to solve this problem, the coating oil needs to be stored in a warm place. If the temperature of the coating oil is too low, it must be properly diluted with a solvent.
Printing inks used for printing products after printing inks must be solvent-resistant and heat-resistant. Otherwise, the printed matter will be discolored or wrinkled. The solution is to pay attention to the following points when selecting inks for printing: 1 Use alcohol-resistant solvents, ester solvents, and acid-base inks. 2 It is recommended to use inks that are not discolored and have good gloss. 3 To choose an ink that has good adhesion to paper.
Crystallization of printed matter The phenomenon of crystallization is mainly due to the fact that the printed matter is left for too long, the area of ​​the ink at the bottom of the print is too large, and the dry oil is excessively discharged. The ink film will crystallize on the surface of the paper, which often causes the glazing Go up or produce "flower face", "rough spots" and other phenomena. In order to solve this problem, 5% lactic acid is generally added to the varnish and it can be used after stirring. The modified varnish is applied to the printed matter so that the vitrified film on the surface of the printed matter is damaged, and the varnish can be evenly applied to the surface of the printed matter to form a glossy film. (Text / Jin Yin He) ("Printing Weekly")
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