High-definition Printing Technology Features and Applications (2)

Controlling the quality of image printing is essentially the control of the quality of the printed matter at the Internet site, understanding of the causes and laws of network changes, and providing the basis for printing quality control. The area of ​​the film's Internet access point will change in different ways when printed on the PS plate and the ink is transferred to the substrate.

When the film is printed, the optical diffusion and diffuse reflection of the PS plate will reduce the width of the finest layer on the plate, so that the dot area on the plate is smaller than the dot area on the film. The reduction in tone value is related to the plate and printing process parameters. Under the same conditions, the decrease in tone value is proportional to the number of screen lines. The ink on the printing plate will expand around the dots under the pressure. The greater the pressure, the more powerful the expansion. Experiments have shown that, under the same process conditions, the increase in printing tone value is proportional to the number of screen lines. For FM sites, the amount of area change caused by printing and printing is a function of the sum of the side lengths of the outlets. The total length of the bank's side lengths is related to the location of the outlets, in addition to the outlets themselves. Using different dot algorithm, the splicing situation of the dot will be different, and the characteristic curve of the increment tone value will be different.

The gradation value measured on the film is used as a reference for changing the tone values ​​of printing and printing dots. The dot area measured using a densitometer is actually calculated from the measured density value. The incident light emitted by the light source is absorbed excessively at the edges of the dots. Therefore, the density value received by the detector is larger than the theoretical value. Therefore, the dot area value calculated by the density value is naturally larger than the actual area value. The greater the sum of the side lengths, the greater the deviation between the two. When applying high-resolution dots, it is necessary to compensate for the area deviation generated by the densitometer measurement and make the measured dot area of ​​the film consistent with the actual area. There are two ways to solve the problem: First, use an instrument that calculates the dot area by photographic means, such as the PS version. Second, use the Yule Nielsen formula instead of the Marley Davis formula. Measure the density of the dots. area. However, in order to calculate the n correction factor in the Yule Nielsen formula, the PS plane measuring instrument or other image analysis microscope camera must be used in advance to measure the actual area of ​​the film web site, and measure the density of the film space, the density of the field, and the dot density. Different number of screens, different values ​​of n.

As mentioned above, the printing and printing processes change the area of ​​the dot, and the size of the change is related to the number of lines of the screen, that is, the sum of the lengths of the sides of the dots. High-resolution dots, amplitude modulation nets above 250 lpi, and FM edge widths below 20 μm are easily obtained by applying the above method to the tone curve. Each type of screen number or the tone curve of the FM network is different, and the corresponding difference should be analyzed based on the 175 lpi tone curve. In the existing process control methods, the integrated technology is found and combined, so that the high-definition printing technology can achieve stable production applications under the existing equipment and materials of the enterprise. High-definition printing products look more clear, delicate, and soft, and the printing color tone characteristics are closer to the originals, and there will be no situation of loss of brightness adjustment, too boring tone, dark shadow tone, and dark paste. High-definition printing technology provides the most powerful new weapons for fierce market competition. The improvement of the performance of contemporary printing equipment and materials has provided the necessary conditions for the application of high-definition printing technology. In addition, high-definition printing technology and high-fidelity color printing technology at the same time, will also be a perfect match, the icing on the cake, so that printed products have a new look and value.

Office Chair

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