Film output may be used in the packaging and printing industry. Of course, some problems and steps need to be paid attention to when outputting film.Steps to be done before film output.
1. Format of documents
At present, most of the output centers adopt the square grid (pspnt) dot color separation output system, and some adopt Harlequin or Israel’s saiangel and other systems. However, there are similarities to supporting postscrit printer documentation.Steps to be done before film output.
That is, the suffix is. PS file. Currently popular design software: Photoshop, PageMaker, CorelDRAW, illustrator, etc. support PS printing. S2, PS2 and PS files generated by founder software such as founder book edition, thinking and leap can only be output by pspnt, which is not supported by other output systems.Steps to be done before film output.
In addition, word, WPS2000 and other language processing software can theoretically generate PS files and output films, but in fact, the output before printing must be processed such as composition, jacket standard line and cutting line. Word, WPS2000 and other software are powerless in this regard, especially color originals. Therefore, try to choose a series of professional design and layout software such as PageMaker.Steps to be done before film output.
2. About the form and accuracy of the image
Offset printing (four-color overprint) is used in modern offset printing, that is, the picture is divided into four colors: green (c), product (m), yellow (y) and black (b), and then dried into PS version. After four times of printing by offset press, it is a color printing product. Therefore, the picture for printing is different from the picture for ordinary computer display. The picture must be converted to CMYK mode instead of RGB mode or other modes. Because the output is to convert the picture into a dot, that is, the accuracy: DPI. Theoretically, the minimum accuracy of the picture for printing should reach 300dpi / pixel / inch, so the picture usually used by everyone cannot be subject to the display.Steps to be done before film output.
Don’t think it can be used for printing because the picture is very fine and beautiful after being enlarged by ACDSee or other software. It must be opened by Photoshop, Use the item of image size to confirm its true accuracy. For example, if the resolution of a picture is 600 * 600dpi / pixel / inch, its current size can be more than doubled, and there is no problem using it. When the resolution is 300 * 300dpi, it can only be reduced or expanded, not expanded. If the image resolution is 72 * 72dpi / pixel / inch, you must reduce its inch until the resolution is 300 * 300dpi. (when using this function, the item “redefine pixels” in the image size option in Photoshop is set to none.)Steps to be done before film output.
3. About the color of photos
For some professional terms such as overprint, overprint, hollowing out and spot color in printing, you can refer to some basic printing knowledge. I won’t explain them one by one here. Just say some common sense that must be paid attention to. The first is the problem of hollowing out.Steps to b.e done before film output
For example, if a line of blue words is pressed on a red bottom plate, the position of the blue words on the red version of the film must be empty. On the contrary, the same is true for the blue version. The second is the reprint problem. For example, if there is a line of black words on a red bottom plate, the position of black words should not be hollowed out in the red version of the film.Steps to be done before film output.
The second is the problem of four-color characters. This is also a common problem. Before going out, you must check whether the black characters, especially the small characters, are only on the blackboard and should not appear on other three-color plates. If it does, the quality of the printed finished product will be discounted. When RGB graphics are converted to CMYK graphics, 100% of the black text will become four-color black. In order to output the film, it must be processed.Steps to be done before film output.