The principle of computer color separation for HP laser printers

HP LaserJet6P (hereinafter referred to as HP6P) is a laser printer that has become popular in recent years. It is not only a good assistant for office workers, but also shows its extraordinary in the printing industry. In the printing industry, screen printing occupies a certain position. Many people are engaged in the work of screen-making, and many of them have bought equipment such as PCs for typing and drawing, and typed and made plates by themselves. Some people are more affluent and bought HP6P printers to work. However, these people have encountered certain problems in their work: how to automatically separate a four-color scanning graphic with different dots using a computer? When the screen-making personnel are not very skilled in plate-making technology, or the printing technology of the screen printing factory is not very high, the dots of the color separation sheets they need are large, how to separate them by the computer automatic color separation setting What about color separations?

The resolution required for the color separation of the silk screen computer is generally 75dpi, 150dpi, 300dpi, 600dpi, and the color dot generally requires a small dot density and a large dot. In the HP6P's own print driver, in the print quality options, the resolution is only 600dpi high-quality and toner-saving options. The 600dpi resolution allows the computer to automatically separate color separations, which can meet certain plate-making requirements . However, in some cases, such as the need to automatically separate a four-color scanned image with different dots with a computer, using a 600dpi resolution to allow the computer to automatically separate colors will not meet the requirements. When automatic color separation is performed in a carbon-saving manner, the separated color separation pieces are all gray and cannot be used for plate making at all. What method can be used to make the color separation film automatically separated by the computer meet the needs of different levels of the silk screen version?

After many studies, it was found that if the HP6P's own print driver is deleted, and then the WIN98's own HP6P print driver is installed, and some problems caused by the WIN98 print driver printing are solved, it will be very good. Use the HP6P printer to electrically separate the dichroic film used for the silk screen.

The first step: delete the original HP6P print driver, install the HP6P print driver with WIN98. There are two installation methods: one method is to let WIN98 automatically install the print driver for the HP6P printer when WIN98 is installed on the machine; the second method is to use the mouse to click "start" when the computer has already installed WIN98, and then come out Select "Settings" in the menu, click "Printer" with the mouse in "Settings", click "HP LaserJet6P" with the mouse in the screen that comes out, and then delete it with the delete command. Next, double-click the "Add Printer" icon, follow the on-screen instructions, click "Next" with the mouse, select "Local Printer", click "Next" with the mouse, select "HP" from "Manufacturer", select from "Printer" "HP LaserJet6P", and then follow the on-screen instructions to complete the installation.

Step 2: After making a color image in drawing software such as CorelDraw or drawing a complex scanned graphic, set the print settings, select "Properties" in the print settings, and select "Graphics" in the "Properties" screen , The screen will appear as follows: Select "Resolution" in the "Graphic Screen", the resolution options are 600dpi, 300dpi, 150dpi, 75dpi, you can choose the corresponding resolution according to the requirements of the plate making, and then choose according to other requirements of the plate making For other options in "Graphic Screen", press "OK", select "Color Separation" in "Option (T)", then select "Print Color Separation", and then select the color of the color separation, press "OK" The color separation can be printed automatically. At present, our center has distributed a lot of color separation films for customers, and the results are good. After the test, all the devices with the "color separation" option in the original printer driver of the printer (such as the HP6L replacement product in the last one or two years, the HP6P replacement product HP LaserJet2100TN, etc.) can perform the above operations. As printer products are constantly being updated, it is believed that there will be many printers with simple electrical separation functions and electrical separation of higher quality separations.

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