COVER  
 
PDF COVER FILE
  
     
  PAGEPDF  
 
Figure 1: Opening file in PDF
  
     
  pagesetup  
 
Figure 2: Print Setup Tab
  
     
  print1  
 
Figure 3: Print dialog box
  
     
  output  
 
Figure 4: Advanced Print Setup-Output
  
     
 
print2
  
 

Figure 5: Output Tab A. Indicates that the color will print. B. Indicates a spot color.

  
     
  print2  
 
Figure 5: Advanced Print Setup-Output
  
     
  fig5  
 
Figure 6: Color Management Tab
  

 

 

 

 

 

 

 

PDF Color Separation

Prepare to print separations

Before you print separations, do the following 3 steps:

Step 1: Calibrate and profile your monitor

When you calibrate your monitor, you are adjusting it so it conforms to a known specification. Once your monitor is calibrated, the profiling utility lets you save a color profile. The profile describes the color behavior of the monitor—what colors can or cannot be displayed on the monitor and how the numeric color values in an image must be converted so that colors are displayed accurately.

  1. Make sure your monitor has been turned on for at least a half hour. This gives it sufficient time to warm up and produce more consistent output.
  2. Make sure your monitor is displaying thousands of colors or more. Ideally, make sure it is displaying millions of colors or 24-bit or higher.
  3. Remove colorful background patterns on your monitor desktop and set your desktop to display neutral grays. Busy patterns or bright colors surrounding a document interfere with accurate color perception.
  4. Do one of the following to calibrate and profile your monitor:

  • In Windows, install and use a monitor calibration utility.

  • For the best results, use third-party software and measuring devices. In general, using a measuring device such as a colorimeter along with software can create more accurate profiles because an instrument can measure the colors displayed on a monitor far more accurately than the human eye.

Note: Monitor performance changes and declines over time; recalibrate and profile your monitor every month or so. If you find it difficult or impossible to calibrate your monitor to a standard, it may be too old and faded.

Step 2: Preview Color Separation

You can preview separation plates and ink coverage to ensure that a document meets your requirements.

1, Choose Advanced > Print Production > Output Preview.

2, Choose Separation from the Preview menu, and do one of the following:

  • To view or hide a separation, select or deselect it in the Separations list.

  • To check ink coverage, move the pointer over the document. Ink coverage percentages appear next to each ink name.

Step 3: Preflight PDFs

To verify that your PDF contains only the features, fonts, and formatting that you’ve specified, use the Preflight tool to inspect, and in certain cases, correct the document’s contents.

Use the Preflight tool to determine a document's validity for print production or other conditions. When you preflight a document, you validate that the document contains only specific features, fonts and formatting.

1. Choose Advanced > Preflight

2. Select a profile from the list. To correct errors, select a profile that includes a fixup. These are denoted by a wrench icon symbol next to the profile.

3. Click Execute.

If the PDF has no problem at all proceed to page setup tab.

What is a color management system?

Color-matching problems result from various devices and software using different color spaces. One solution is to have a system that interprets and translates color accurately between devices. A color management system (CMS) compares the color space in which a color was created to the color space in which the same color will be output, and makes the necessary adjustments to represent the color as consistently as possible among different devices.

A color management system translates colors with the help of color profiles. A profile is a mathematical description of a device’s color space. For example, a scanner profile tells a color management system how your scanner “sees” colors. Adobe color management uses ICC profiles, a format defined by the International Color Consortium (ICC) as a cross-platform standard.

Because no single color-translation method is ideal for all types of graphics, a color management system provides a choice of rendering intents, or translation methods, so that you can apply a method appropriate to a particular graphics element. For example, a color translation method that preserves correct relationships among colors in a wildlife photograph may alter the colors in a logo containing flat tints of color.

Note: Don’t confuse color management with color correction. A color management system won’t correct an image that was saved with tonal or color balance problems. It provides an environment where you can evaluate images reliably in the context of your final output.

 

Task 1: Preparing artwork for color separation

Before you print color separations from PDF, it’s a good idea to perform the following prepress tasks:

First: Copy the Image " BT GAPT COVER" file onto your computer.

Double click it will Launch Adobe PDF application.

Then, Open the pdf file

How: File > Open [Shortcut: Ctr+O] search from the place you saved
Action: PDF artwork file will open in the screen by PDF application

(See Figure 1)

Task 2: Embed printer marks in a PDF

  1. Choose Advanced > Print Production > Add Printer Marks, or select the Add Printer Marks tool  on the Print Production toolbar.
  2. Specify the pages to mark.
  3. Specify the marks and settings.

Add Registration Marks in your film output

  • Select the Marks and Bleed tab.
  • Select the Trim Marks tab.
  • Select the Registration Marks tab.
  • Select the Color Bar tab.
  • Select the Page information tab.

 

Task 3: Print color separations

Acrobat supports host-based separations and in-RIP separations. The main difference between them is where the separations are created—at the host computer (the system using Acrobat and the printer driver) or at the output device’s RIP.

For host-based separations, Acrobat creates PostScript information for each of the separations required for the document and sends that information to the output device. For in-RIP separations, the work of separating a file is performed by the RIP. This method often takes less time than creating host-based separations, but it requires a PostScript 3 output device with in-RIP separation capability. To produce in-RIP separations, you need a PPD file that supports in-RIP separations, and any PostScript 3 output device or a PostScript Level 2 device whose RIP supports in-RIP separations.

PostScript printers have built-in software that reads and interprets PostScript language into commands for the printer.

  • Choose File > Print, and choose a printer.
  • Choose an option from the Comments And Forms menu.
  • Choose print range and page handling options. s
  • Click Advanced.
  • If you created a custom printer settings file with the appropriate separation settings, choose it from the Settings menu at the top of the Advanced Print Setup dialog box.
  • Select Output on the left, and choose an option from the Color menu:

  • Choose Separations if the PPD doesn’t support in-RIP separations.

  • Choose In-RIP Separations if the PPD supports in-RIP separations. Trapping options appear. From the menu, choose Adobe In-RIP or Off. If you choose Adobe In-RIP, click Trap Presets and select a preset. Click OK.

  • Specify settings for halftone screen frequency, emulsion, and image exposure.
  • If the document contains objects with transparency settings, select an option from the Transparency Flattening Preset menu.
  • Under Ink Manager, deselect any color you don’t want to separate.

    The four process colors (cyan, magenta, yellow, and black) always appear at the top of the color plate list, followed by spot colors in alphabetical order.

  • Click the Ink Manager button to modify ink settings for color separations.
  • Click Marks And Bleeds on the left, and select All Marks.
  • Click PostScript Options on the left, and select settings as needed. Click OK to close the dialog box, and then click OK again to print the separations.

Print a PDF

If the desired printing option is in the Print dialog box, set it there rather than through the printer driver.

  1. Make sure that you’ve installed the correct printer driver and PPD file for your printer. Printing results are generally more predictable with the correct PPD.
  2. Choose File > Print Setup (Windows) or File > Page Setup (Mac OS) to choose a paper size, page orientation, and other general printing options. The options vary with different printers and drivers. See your printer driver documentation for details.
  3. To print comments, such as sticky notes, open the Commenting panel in the Preferences dialog box and select Print Notes And Pop-ups.
  1. Note: To open Preferences in Windows, choose Edit > Preferences. In Mac OS, choose Acrobat > Preferences.
  2. Click the Print button (printer), or choose File > Print.
  3. Choose a printer from the menu at the top of the Print dialog box.
  4. (Mac OS) Choose an option from the Presets pop-up menu.
  5. In Windows, click Properties to set any additional options available with the printer driver. In Mac OS, set printer driver options in the Print Center.
  6. To print comments or forms, select an option from the Comments And Forms pop-up menu.
  7. Indicate which pages you want to print, and then click OK.

 

How to print color separations on a non-PostScript printer?

If you want to print color separations from Adobe Acrobat CS3 on a non-PostScript printer, you should use RIP Software for Inkjet Printers (RIP - Raster Image Processor).

What is a PPD file and how to select a PPD (PostScript Printer Description) file?

  • In the PPD pop-up menu, select the PPD file.
  • A PPD (PostScript Printer Description) file contains information about the output device. For more information, use Acrobat help "Select a PPD file".

Please note: You can select a PPD file only when you have selected a PostScript printer or RIP Software (Raster Image Processor).

Set advanced print options

Print settings are preserved as long as the application is open. To use the settings again, you can save them in a file.

  1. In the Print dialog box, click Advanced.
  2. If a custom printer settings file exists with the settings you want, choose it from the Settings menu. Otherwise, choose Acrobat Default.
  1. To learn more about an option, select it. A description of it appears at the bottom of the dialog box.
  2. If normal printing doesn’t produce the desired results, select Print As Image and choose a resolution from the pop-up menu.
  3. Select any of the panels on the left side of the Advanced Print Setup dialog box, and set options for either composite or separations output.
  4. To save the settings, click Save As, specify a filename, and click OK. The print settings are saved as an .spf file.
  5. Click OK to accept the settings and return to the Print dialog box.

 

Process and Spot Colors
Frequency
Angles
Dot Shape
Four-Color Process
Cyan
71-133 LPI
15 degrees
Ellipse
Magenta
71-133 LPI
45 degrees
Ellipse
Yellow
71-133 LPI
75 degrees
Ellipse
Black
71-133 LPI
75 degrees
Ellipse
All Solid Spot Colors
71-133LPI
15 degrees
Ellipse
Simulated Spot/Process
Spot/Process Colors
71-133 LPI
22.5 degrees
Ellipse

Screen Variations Guidelines:

  1. VERY FINE SCREEN FOR ARTBOOK & HI-QUALITY PHOTOS MAGAZINE: 200 LPI
  2. HIGH QUALITY AND FINE SCREEN FOR ANNUAL REPORT: 177 LPI
  3. STANDARD HIGH QUALITY SCREEN FOR FOUR COLOR MAGAZINES: 133 - 150 LPI
  4. AVERAGE SCREEN FOR NEWSPAPER : 85 LPI
  5. NEWSPRINT/GROCERY COUPONS: 65 - 71 LPI

LPI - The number of lines per inch in a halftone screen. The higher the LPI the finer the screen.

Please note, that the default values are determined by the PPD file.

 

Note: The color separation of 4 color CMYK and 4 spot color layout of your artwork will separate in 8 film output. Your job is done! Congratulations!
 
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