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When we compare color, we only discuss how the test patch compares to the reference image. Thus, if the result is positive this means the technical rendering is correct. Color is just a means to test the rendering of the technical issues arising when using transparency, layers and non visible content. Esko does not claim that the WebCenter Viewer is color accurate when comparing print to screen.

PDF To X 4.0

As the biggest difference in both Tickets lies in the color profile handling we do not see any differences between the old and the new Ticket. On a technical level, we do sometimes see some artifacts but these do not differ from the original Ticket and can be ignored in the GWG Test suite. The WebCenter Viewer thus passes the test suite.

Although some restrictions apply concerning the RGB shadings. For more information, see: However there are a number of potential problems. Color conversion based on ICC profiles can result in output separations that generate bad print quality. Some examples: The output separations will most likely contain C, M, Y and K values. For small text on print processes with imprecise register this is a problem. Conversion of an object in CMYK other than the output intent can result in CMYK values with different black generation and a TAC total area coverage that exceeds the limit for the intended printing process.

In many output devices, Relative Colorimetric is the default intent. In all cases, intents may be ignored or overridden by color management operations that occur subsequent to the creation of the PDF file.

Gray Choose a profile to define the color space of all grayscale images in files. Choose None to prevent grayscale images from being converted. Choose None to prevent RGB images from being converted. The default is U. Choosing None for all three working spaces has the same effect as selecting the option Leave Color Unchanged. Black generation calculates the amount of black to use when reproducing a color.

Undercolor removal UCR reduces cyan, magenta, and yellow to compensate for black generation. Transfer functions are used for artistic effect and to correct for the characteristics of a specific output device.

Remove Deletes any applied transfer functions. Applied transfer functions should be removed, unless the PDF is to be output to the same device that the source PostScript file was created for.

Preserve Retains the transfer functions traditionally used to compensate for dot gain or dot loss that may occur when an image is transferred to film. Dot gain or loss occurs when the ink dots that make up a printed image are larger or smaller than in the halftone screen.

This method is useful for creating color effects in a file. Preserve Halftone Information Retains any halftone information in files. Halftone information is intended for use with a particular output device. In a PostScript file, DSC comments contain information about the file such as the originating application, the creation date, and the page orientation and provide structure for page descriptions in the file such as beginning and ending statements for a prologue section. DSC comments can be useful when your document is going to print or press.

Use only in controlled workflows where there is no other option. If you have a PostScript file and select this option, a copypage operator copies the page. If this option is not selected, the equivalent of a showpage operation is executed, except that the graphics state is not reinitialized. Overprint settings create color by printing one ink on top of another ink.

When deselected, performance improves because only decompression, not recompression, occurs. Use Prologue. These files can be used to add custom PostScript code that you want to have executed at the beginning or end of every PostScript job being converted.

Sample Prologue. Or, you can type the path into the Address text box. In Acrobat Standard, Distiller processes prologue and epilogue files only if both files are present and located properly. The two files must be used together. In Acrobat Pro, Distiller processes prologue and epilogue files only if both files are present and located properly. If the prologue and epilogue files are at the same level as the In and Out folders of a watched folder, they are used instead of the ones in the Distiller folder.

For more information, see the OPI 2. If deselected, the page is sized and centered based on the upper left corner of the upper left object and lower right corner of the lower right object on the page.

This option applies only to jobs that consist of a single EPS file. The availability of options depends on the standard you select.

Compliance Standard Produces a report that indicates whether the file complies with the standard you select, and if not, what problems were encountered. Continue Creates a PDF even if the PostScript file does not meet the requirements of the standard, and notes these problems in the report.

Report As Error Acrobat Pro Flags the PostScript file as noncompliant if one of the reporting options is selected and a trim box or art box is missing from any page. Set TrimBox To MediaBox With Offsets Acrobat Pro Computes values for the trim box based on the offsets for the media box of respective pages if neither the trim box nor art box is specified. The trim box is always as small as or smaller than the enclosing media box. The bleed box is always as large as or larger than the enclosed trim box.

If your workflow requires that the document specify the output intent, choose None. Output Condition Identifier Acrobat Pro Indicates the reference name that is specified by the registry of the output intent profile name. For more information, click the question mark next to the option. Output Condition Acrobat Pro Describes the intended printing condition.

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PDF To X 4.0