The influence of printing machine speed on print q

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Analysis: the impact of printing machine speed on print quality

the faster the printing machine speed, the higher the output, and the more prints per unit time. However, faster printing machines will also lead to faster production of more waste! Therefore, for the speed problem, we should first understand the influence of changing the machine speed on the printing quality, so as to optimize the parameters of the printing machine at the possible limit speed

what is the impact of changing the speed of the printing machine on the final print? Is the news of Suning cloud merchants applying for private bank licenses breaking out for the first time? This paper analyzes the relationship between the speed of the printing machine and other components related to printing, including the roller, plate and substrate, and how it changes the field and copy tone, but tries to connect them

when the hole on the embossing roller passes through the sealed ink bucket, the hole is filled with ink. When the roller leaves the ink bucket, the doctor blade scrapes the ink along the direction of the hole to remove the excess ink from the surface of the roller. However, due to the viscosity and surface tension (molecular internal force) of the ink, the doctor blade will also drag a part of the ink out of the hole. The dragged ink will deflect the ink towards the rear end of the hole, resulting in uneven ink distribution. A complex system structure and the corresponding high manufacturing cost. After the hole is separated from the ink bucket, the ink gradually becomes flat in the hole

filling of the wrinkle roll hole in the ink bucket

the amount of ink in the hole depends on several parameters, including the speed of the wrinkle roll passing through the ink chamber. When the speed is low, the shear force between the inks is small, and the amount of ink dragged is small. With the increase of speed, the shear force increases, and the amount of ink dragged increases. Moreover, too fast speed will also reduce the ink inking time before reaching the printing plate. Therefore, too fast will reduce the supply of ink to the printing plate, reduce the color concentration of the final print, and make the image look lighter

offset of ink when the corrugated roller leaves the ink bucket

changing the speed of the printing machine has different effects on paper and plastic film. In the process of transferring ink from the printing plate to the substrate, the ink can be transferred by the absorption speed of the substrate (such as paper) or by ink film separation. The separation of the ink film between the printing plate and the substrate is usually uneven, and more ink remains on the printing plate than is transferred to the substrate. With the increase of the speed of the printing machine, the position of the ink layer separation point will shift to the substrate, resulting in more residual ink on the printing plate and lower field density of printing

if all printing densities rise and fall together, the color of the print will be lighter. This will also happen in tone reproduction, because the change of printing machine speed has a greater impact on tone reproduction. The influence of printing machine speed can be judged by dot enlargement (dot enlargement can measure the transfer of ink with relative field density)

the slowest speed is first set to 40m/min, and the corresponding minimum speed change is shown in the vertical axis in the figure to see the expansion of different points. As the speed increases, the point expansion decreases, and the maximum change is close to 4%. As the ink diffuses inside the paper structure, the focus point will increase. As the printing machine speeds up, the time for ink to be absorbed through the substrate decreases, so the diffusion of ink in the substrate decreases, and the dot expansion decreases

effect of speed on tone reproduction

on the whole, the speed of the printing machine affects the transfer of ink. With the increase of speed, the field density and dot expansion mostly change. As the speed increases, the density decreases, and the tone of the print becomes lighter. These density changes are so large that they can be recognized by the naked eye, which has a fatal impact on the image quality. Customers will refuse such products. Without understanding the impact of speed, blindly increasing speed can only produce more waste products faster

"because there is no standard requirement

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