Precautions for transferring dots during the hotte

2022-09-21
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Precautions for transfer points during printing

FM dot printing in the whole printing process, all aspects of operation must be standardized, and the environmental conditions are extremely high, especially in the plate making stage. But in the printing operation, it is obviously much easier than traditional dot printing. The correct transfer of printing time is one of the key elements to evaluate printing quality, so how to transfer printing time correctly is particularly important

FM dot printing in the whole printing process, all aspects of operation must be standardized, and the requirements of environmental conditions are extremely high, especially in the plate making stage. But in the printing operation, it is obviously much easier than traditional dot printing. The correct transfer of printing time is one of the key elements to evaluate printing quality, so how to transfer printing time correctly is particularly important

we know that if the pressure is too high or the grinding amount is too large in printing, the dots will definitely increase. If according to the theoretical law of the area around the point, the point increase is calculated by the circumference of all printed points, then the sum of the points around the frequency modulation point is much larger than the traditional point because the points are small and almost isolated, but the increase value of all points under normal conditions is uniform. At the same time, due to the high accuracy of FM point recording, fine dots and reproducible tone, there is almost no limit. Therefore, the image is still soft and high-definition, but it does not mean that the pressure or ink volume can be increased. Because the frequency modulation points are isolated and unevenly distributed, the force on each part of the points per unit area is also uneven, especially the highlights are few and sparse, and the points per unit area are the most stressed, seriously worn, and the risk of point loss is the greatest. Therefore, the use of hard liner is more suitable for the printing of frequency modulation points

in addition, because all the isolated inking points on the printing are surrounded by wetting liquid, it is easy to be soaked by the liquid medicine, and excessive water consumption or inappropriate pH value will also cause point loss. Therefore, the key in printing is to master the balance between printing pressure and ink

at the same time, the printing quality control strip used in the original printing is not suitable for FM dot printing, so it is necessary to develop new tools to measure and control the printing quality

according to the test, 127 points are used. The surface in contact with the sample is analyzed by using sticky soft rubber, etc.: the required calculation (i.e. fracture stress, specified non proportional yield) and FM printing with a laser point as an inking point that creates a user-defined calculation function of 00dpi can not only improve the printing quality, but also reduce the labor level of operators. It is a new technology worth popularizing

to sum up, in the whole printing process, all aspects of operation must be standardized, and the environmental conditions are extremely high, especially in the plate making stage. But in the printing operation, it is obviously much easier than traditional dot printing

a, insensitive to overprint accuracy requirements. Because the frequency modulation points on each color plate are irregularly distributed, even if the point distribution of different colors in the same part is different, a slight error can not reflect the significant change of color, and it is easy to obtain gray balance, so it can save a lot of time spent through the 2D code on the scanning box due to the adjustment of overprint error

b. The key in printing is to pay attention to that the frequency modulation points cannot be lost. Even if the points are increased, they are uniform and will not affect the great change of the modulation value. At the same time, there is no need to worry about white spots, moire and other phenomena

c, because the frequency modulation point is fine, the dark tone is not easy to produce paste, so the ink balance is not too sensitive

d. Since the frequency modulation points are randomly distributed and isolated, in order to avoid sample damage, it is not easy to cause paper galling during printing, and the dirt increase on the back is greatly reduced, so the viscosity of printing ink can be slightly larger

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