Layout design When outputting film files, two factors need to be taken into account: First, it is necessary to pay attention to adjusting or merging the contents of the layout, leaving a small gap between different contents, but it must be ensured that different contents can be cut. . The benefits of doing so can not only save the cost of output film, but also can use fewer plates when making plates.
Another aspect is the consideration of the printing plate elongation. At the time of plate making, the printing plate does not shrink or stretch. When the printing plate is mounted on a plate roller, the plate extends in the direction of the plate roller. Therefore, in the layout design, the extension of the printing plate should be calculated in consideration of the feeding direction, and the printing plate should be reduced in the circumferential direction to ensure that the printed product pattern is not deformed.
The printing plate extension rate can be calculated, and its empirical formula is:
Printing plate elongation=(printing roller+printing blanket thickness) ÷(printing roller+printing cushion thickness+printing plate thickness)×100%, the actual size printed at design time multiplied by the printing plate extension is the design The actual size of the manuscript, under normal circumstances the print version of the extension rate of 98%
Author/Li Yutian