What checks and adjustments can be made before printing to avoid printing whiteness?
Date：
2022-09-23
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Today, we will tell you what work was done before printing, which can effectively avoid the occurrence of printing whitening.
Is not often encountered this situation, in the paper box printing process suddenly found printing is white, so the operator began to increase the printing pressure. This method sometimes works, but not every time. What if there are still white spots after increasing pressure? As a result, some operators keep increasing the pressure, and as a result, even though the cardboard is flattened, there is still whiteness.
As we all know, doing some checking and adjusting work before printing can avoid printing to a great extent. So what checks and adjustments should we do before printing on cartons.
1, check whether the ink viscosity is normal before loading
One of the common problems of printing whitening is that the viscosity of the ink is too low, and this is more likely to occur after repeated use. Because in the production process, printers often have to add water in the cartridge, resulting in a drop in ink viscosity. As a result, the printout will be white, so be sure to test the ink before going on the machine.
2. Check whether the printing plate is good
Printing plate use for a long time or the printing plate surface ink is too dirty, will reduce the ink transfer of the printing plate, when the ink transfer is reduced, there will often be printing whitening phenomenon.
3. Anilox rollers
Anilox rollers clean directly affect the printing situation. A large part of the anilox roller blockage is not cleaned, so the ink volume of the anilox roller is small, resulting in the phenomenon of white printing.
Translated with www.DeepL.com/Translator (free version)
occurrence,whiteness,operator
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