Designing a PDF file for color separation, knowledge of color separation and familiarity with the function of color separation device. If PDF files are created in the right way, they can be separated and printed smoothly. However, if the designer fails to follow the basic elements and steps to create a PDF file for use in the prepress environment, the output center may need to work hard to output the file correctly. To create a PDF file that can be separated, it is necessary to have a basic understanding of print separations and special colors, as well as the ability to correct certain color-setting errors.
Printing into a printed color The simplest method for a print job before printing a PDF file for a prepress worker is to store the PDF file output in an EPS file format or to use external software to assist in printing. When making a PDF file that can be printed and separated, no matter if it is stored as an EPS file or printed directly, it can only contain four colors of CMYK, and any special color needs to be converted into a process color.
Printing color separation refers to the output of the color separation of the file as a four-color version. Each color version records the ink value of CMYK, and is imaged with a halftone dot pattern. Each color version generally has a fixed dot angle, such as C15, M75, Y0, K45. The importance of setting the angles of the various color dot points is as important as setting the dot line number, the page size, and the orientation of the mesh film surface. If there are two or more dots on the same color at the same time during printing, it will cause mis-network, so pay special attention to the different dots of different colors in the output, and the dot processor will use the specific over-net mode to reduce the image. Net flower production. The application software with the printing color separation capability usually supports the standard dot angle, so most of the time when setting the printing color separation does not take time to consider the dot angle. In an ideal situation, we should not focus on special colors in the printing of color separations, but it is counterproductive. Many accepted files are made by some inexplicable software that does not have separation capabilities. from.
Solving Color Problems In fact, most designers fail to understand the needs of the pre-press operating environment. Under these circumstances, there are some problems with the design of graphic integration files. The most common problems, such as defining color attributes, are unclear about the difference between printed color separation and special color separation.
The designer can print the original file as a Postscript file by printing it as a file, which can solve some of the frequently occurring problems. However, if the application software used does not support color separation printing, even if the stored Ps file is converted to a PDF file, most of the conditions cannot be printed out smoothly, unless some auxiliary software can be used.
One of the application software is the famous Adobe Pmaker. In version 6.52, you can directly read in and place a PDF file, but you need to add an Adobe PDF file import program (Adoe`s PDF import filter). This program can be downloaded from the Adobe website. (Mac version - http://LIBRARY/pmMac.htm, Windows version - http://LIBRARY/pmwin.htm). After downloading, follow the instructions in the installation instructions to install the program.
Quark typesetting software also has a PDF import and export (Xtension) program that can be placed directly into a PDF file or exported to a PDF file. However, only Quark versions after version 4.02 can be used.
Special color printing of PDF files does not directly print out special colors, even if it is an EPS file containing special color PDF files. Unless you first print the Ps file with the special color file and save the component color, and then convert it into a PDF file, then you can hand the PDF file to the output center. The special color dot angles need to be set in advance in the typesetting software and then stored in the hard disk into a Ps file.
Both Pagemaker and Quarkxpress layout software provide enough print setup options for proper handling of process colors and special colors. When setting one or more special colors in the file, please refer to the following precautions:
1. The printer description file using the output device: The main purpose of producing the separated color file is to use the color separation plate. In general, the printer description file of the prepress output device provides more information than the Acrobat Distiller PPD. Handling the control settings for printing separations, it is recommended to use the printer profile of the output device to print the Ps file.
2. Use a uniform color name: When placing files from other applications, special attention should be paid to whether the color name is consistent with the original after being converted. The special color of Pantone 167CVC in Photoshop and the Pantone 167CV in the typesetting software According to different special colors, it is divided into two different color versions. In typesetting software, note the special color names listed in the print dialog box when printing. If you find that special color names with the same special color length and short length exist at the same time, remember to change the same before saving the Ps file. The special color name.
3. Change the special color dot angle to the dot point of the printing color separation: the general preset value defines the special color dot angle as 45 degrees. If a dual tone image or file contains black and special colors, or If there are two special colors, both colors will be output at 45 degrees during printing. Therefore, the color setting or print setting dialog box must be opened to change the halftone angle during color separation printing.
4. Print only the colors included in the file: Unselected colors will not be listed or stored in the Ps file. If the currently used software does not support individual selection of colors in the print window Whether the function is printed or not, you can use Acrobat to open the PDF file and delete all blank pages after you convert to a PDF file to remove the colors that are not actually used.
5, the use of printed marks: When printing a file, it is best to include a cutting line, cross-line and color name, in the general printing separation software, there will be settings to choose whether to include the above-mentioned printing marks. The name of each colored plate after color separation is marked on the cutting line of the plate for identification.
6. The PDF file is opened before the print preview preview: Another advantage of the PDF file is that you can use Acrobat to start previewing the colored versions, and you can also see the color separation of special colors, but you cannot preview the color versions. From the dot angle, if the color plate obtained after color separation is more than the actual color plate number, it can be seen that there is an error in the color setting. Previewing a PDF file is also a simple proofing method to help you check if there is a problem ahead of time when sending to the output center. The color separation Ps containing the special color of the separated PDF file or the printing separation can be directly printed on the Ps output device.
Printing into a printed color The simplest method for a print job before printing a PDF file for a prepress worker is to store the PDF file output in an EPS file format or to use external software to assist in printing. When making a PDF file that can be printed and separated, no matter if it is stored as an EPS file or printed directly, it can only contain four colors of CMYK, and any special color needs to be converted into a process color.
Printing color separation refers to the output of the color separation of the file as a four-color version. Each color version records the ink value of CMYK, and is imaged with a halftone dot pattern. Each color version generally has a fixed dot angle, such as C15, M75, Y0, K45. The importance of setting the angles of the various color dot points is as important as setting the dot line number, the page size, and the orientation of the mesh film surface. If there are two or more dots on the same color at the same time during printing, it will cause mis-network, so pay special attention to the different dots of different colors in the output, and the dot processor will use the specific over-net mode to reduce the image. Net flower production. The application software with the printing color separation capability usually supports the standard dot angle, so most of the time when setting the printing color separation does not take time to consider the dot angle. In an ideal situation, we should not focus on special colors in the printing of color separations, but it is counterproductive. Many accepted files are made by some inexplicable software that does not have separation capabilities. from.
Solving Color Problems In fact, most designers fail to understand the needs of the pre-press operating environment. Under these circumstances, there are some problems with the design of graphic integration files. The most common problems, such as defining color attributes, are unclear about the difference between printed color separation and special color separation.
The designer can print the original file as a Postscript file by printing it as a file, which can solve some of the frequently occurring problems. However, if the application software used does not support color separation printing, even if the stored Ps file is converted to a PDF file, most of the conditions cannot be printed out smoothly, unless some auxiliary software can be used.
One of the application software is the famous Adobe Pmaker. In version 6.52, you can directly read in and place a PDF file, but you need to add an Adobe PDF file import program (Adoe`s PDF import filter). This program can be downloaded from the Adobe website. (Mac version - http://LIBRARY/pmMac.htm, Windows version - http://LIBRARY/pmwin.htm). After downloading, follow the instructions in the installation instructions to install the program.
Quark typesetting software also has a PDF import and export (Xtension) program that can be placed directly into a PDF file or exported to a PDF file. However, only Quark versions after version 4.02 can be used.
Special color printing of PDF files does not directly print out special colors, even if it is an EPS file containing special color PDF files. Unless you first print the Ps file with the special color file and save the component color, and then convert it into a PDF file, then you can hand the PDF file to the output center. The special color dot angles need to be set in advance in the typesetting software and then stored in the hard disk into a Ps file.
Both Pagemaker and Quarkxpress layout software provide enough print setup options for proper handling of process colors and special colors. When setting one or more special colors in the file, please refer to the following precautions:
1. The printer description file using the output device: The main purpose of producing the separated color file is to use the color separation plate. In general, the printer description file of the prepress output device provides more information than the Acrobat Distiller PPD. Handling the control settings for printing separations, it is recommended to use the printer profile of the output device to print the Ps file.
2. Use a uniform color name: When placing files from other applications, special attention should be paid to whether the color name is consistent with the original after being converted. The special color of Pantone 167CVC in Photoshop and the Pantone 167CV in the typesetting software According to different special colors, it is divided into two different color versions. In typesetting software, note the special color names listed in the print dialog box when printing. If you find that special color names with the same special color length and short length exist at the same time, remember to change the same before saving the Ps file. The special color name.
3. Change the special color dot angle to the dot point of the printing color separation: the general preset value defines the special color dot angle as 45 degrees. If a dual tone image or file contains black and special colors, or If there are two special colors, both colors will be output at 45 degrees during printing. Therefore, the color setting or print setting dialog box must be opened to change the halftone angle during color separation printing.
4. Print only the colors included in the file: Unselected colors will not be listed or stored in the Ps file. If the currently used software does not support individual selection of colors in the print window Whether the function is printed or not, you can use Acrobat to open the PDF file and delete all blank pages after you convert to a PDF file to remove the colors that are not actually used.
5, the use of printed marks: When printing a file, it is best to include a cutting line, cross-line and color name, in the general printing separation software, there will be settings to choose whether to include the above-mentioned printing marks. The name of each colored plate after color separation is marked on the cutting line of the plate for identification.
6. The PDF file is opened before the print preview preview: Another advantage of the PDF file is that you can use Acrobat to start previewing the colored versions, and you can also see the color separation of special colors, but you cannot preview the color versions. From the dot angle, if the color plate obtained after color separation is more than the actual color plate number, it can be seen that there is an error in the color setting. Previewing a PDF file is also a simple proofing method to help you check if there is a problem ahead of time when sending to the output center. The color separation Ps containing the special color of the separated PDF file or the printing separation can be directly printed on the Ps output device.