In the printing of aluminum foil bags, excessive benzene has always been a problem that plagued manufacturers. But if you use water-based gravure ink, you can change this situation and reduce the contamination of the food contained by the residual solvent. In order to ensure the printing effect of customized aluminum foil bags, there are seven precautions for reference during the use process.
①Adjust the ink viscosity with water, generally within 15-25 seconds. To prevent the viscosity from being too high, resulting in dirty and smeared plates.
② When using water-based ink for aluminum foil bag printing, the PH value should be controlled between 8.5-9.
③The drying temperature should be controlled between 50 and 60 degrees Celsius, and the air volume should be large during drying to ensure that the water-based ink transferred to the film can be quickly dried.
④After the ink is poured into the ink tank, the printing plate cylinder should be idling for 2min～3min before starting printing to ensure that the printing plate cylinder is moist and effectively agitate the ink. In the process of printing, if you encounter a temporary shutdown, you must ensure that the printing plate continues to rotate to prevent the ink on the printing plate from drying out and causing cell blockage.
⑤The cell depth of the printing plate cylinder should be shallower, which will help speed up the printing speed and save ink. If the cell is too deep, it will not only hinder the printing speed, consume ink, but also prone to adhesion. The specific depth is maintained at 15-25um.
⑥Before printing custom-made food aluminum foil bags, adjust the ink viscosity according to the depth of the printing plate cylinder cell. Do not add water to the ink during the printing process. If necessary, add new ink to ensure that the audio hue is always consistent.
⑦After printing, you need to wash the plate cylinder immediately, pour clean water into the early ink tank, and rotate the plate cylinder for cleaning, or add 3% detergent solution for cleaning.
At present, the country has included custom-made aluminum foil bags in the mandatory 3C certification catalog, which means that the printing of water-soluble aluminum foil bags will have a broader development. Because it has no benzene, no irritating smell, and no food pollution, it is very suitable Printing of food aluminum foil bags. Under the general trend of environmental protection, this kind of environmentally friendly ink printed aluminum foil bag products will usher in excellent development opportunities.
