In recent years, there have been more and more domestic output centers. Due to the great difference in the output equipment quality, the quality of output personnel is uneven, resulting in a great difference in output quality. Some output personnel did not do serious checks before and after the output, so when the film is handed to the customer, there may be one or the other error. Once the user ignores the inspection of the film, it will cause large Economic losses.
For the inspection of the output film, it can be divided into the following aspects:
1. After the film is output, it is necessary to first measure the size of the heart with a ruler. The error of the version of the heart size may be due to errors in the production, scaling of the output print, or errors in the photosetting device. Generally after the production is completed, prior to outputting, the production output personnel should check the page against the customer's request and correct errors in the production. One aspect of the inspection should include whether the size of the printing plate is consistent with the user's requirements. This can avoid mistakes in the size of the printing plate caused by production errors. In order to print a black and white proof, some documents can be placed on a single sheet of paper. Therefore, "Full Print" is selected during printing. This option is used for output scaling of the size of the printing center. In the above two cases, it is possible to avoid the occurrence of erroneous plate size errors by making the output personnel careful, and the device error cannot be checked before outputting. After the output is required, the size of the film is carefully measured.
2. Check the film for scratches. There are two general scratches: black and white lines. The black line is caused by damage to the film surface of the film before fixing. Some black lines are very fine and need careful examination to find out, but once printed, it will be more obvious. Therefore, when checking, you can put a piece of white paper under the film, which is easier to detect. The white line is caused by scribes in the fixing and subsequent processes, or by scratching the base surface of the film. If you scratch the base surface of the film is generally not a problem, you can print; if you scratch the film surface, and hurt the graphic part, you need to re-export.
3. Check the text. This is a lot of work, especially in the case of a lot of layout text. But this work must be done. In the DTP design, production, and output process, due to various reasons (including software, equipment, and personnel factors), problems such as typos, misplacement, missing words, lost strokes, font changes, garbled characters, and color changes during text output can be caused. These need to be checked carefully, especially if you lose the strokes, it is easy to ignore. Therefore, when checking text, it is often necessary to check verbatim. Some people think that as long as there are black and white proofs, and black and white like no problem, it is not true. Since black and white samples and outputs may use different PS files and RIPs, there are sometimes deviations between the two, and this deviation may cause the appearance of scrap, which is not sloppy.
4. Check the size and position of text, images. In some typesetting software, some functions are used, or the image is scaled in the typesetting software, and the placement format of the image in some typesetting software is not good, which will cause changes in the size and position of the text, the image, and these are Can not be displayed on the screen, to check the film after the output can be found.
5. Check the color. The check of the color is mainly whether the separation is correct. Some people set the colors in the production, but they should select the spot colors for the four-color printing. Some people put the images in the RGB mode. These output films will be reflected on the film. There is some typesetting software, the wrong option is selected when setting the color, it will cause color separation error, in the color version should not have color, there will be dots, the color will appear when the printing will be a certain deviation, Inconsistent with the design idea and user's intention, causing losses.
6. Check the layout information. Each film needs to have: crosshairs, angle lines, color labels, ladder feet and other information, there are some special pages also need to have fold lines, to facilitate the work of the process. Cross and corner lines are used for registering and cutting finished products. Color scales and step scales are used to check the density, color and tone of the field. These are necessary for post-process work and quality inspection. province.
7. Check the overprint. Some people may say that the accuracy of the output device is now very high, and overprinting is accurate and does not require inspection. This argument is wrong. There is some error in the equipment, and the error of each type of equipment is different. Some devices have certain errors in the output of large-format pages. Sometimes, such errors may have more than one line, causing difficulties for printing on the back end; and some devices may have large errors in overprinting during reprinting. Need to re-output four-color film, and not just the same color. Therefore, whether the overprinting of the film is correct must be checked.
8. Check trapping. This mainly checks for the presence of white leaks in some areas where colors are in contact. In printed matter, if the white border between the color and the color is difficult to see (except for the specially designed), this kind of place needs to be trapped (see the article “The Trapping Function and Its Application in the Common DTP Software†)). In the black place, it is necessary to check whether other editions can not be hollowed out. Other colors need to check the empty edition to be hollowed out.
The above inspections are indispensable after the export. The exporting practitioners must carefully inspect the products. After the user obtains the film, he or she must not take it too seriously. They must be carefully checked to avoid causing future disputes and causing unnecessary losses.