Oki C942dp C931 C941 C942 - Fiery C9 Server - Color Guide - Page 18

Color Printing 18 Color print options and adds features that prevent ambiguities related to printing. A PDF/X compliant document contains embedded information about the intended printing conditions for the document. Prints for proofing are expected to look exactly like the output of the final production device, regardless of the capabilities of the printer. For instance, when proofing Newsprint, you want the color gamut of the printer to be very limited compared to its capabilities. In production, you usually want to maximize the use of the printer gamut by applying specific color features. Even in production, however, you might choose to limit the color gamut in order to achieve consistency in the color produced by different devices. The PDF/X output intent option only affects PDF/X files (conforming to the PDF/X3 or PDF/X-1a standard). It has no effect on non-PDF files or PDF files that are not PDF/X compliant. Profiles specified by PDF/X files must be embedded in the files, not referenced from an external locations. Note: With Fiery Graphic Arts Package, Premium Edition, you can use a Hot Folders filter to determine if a PDF file is PDF/X compliant. For information about this Hot Folders filter, see Hot Folders Help. When PDF/X output intent is turned on and no other setting conflicts, the C9 Server processes a PDF/X compliant file in a way that produces results defined by the intents and source color spaces embedded in the file. The C9 Server ignores the CMYK/Grayscale Processing Method and CMYK/Grayscale Source options. The rendering intents in the PDF/X file are used and the printed output is limited to the color gamut specified by the output profile embedded in the file. When PDF/X output intent is turned off, the PDF/X output intent is ignored. You can specify the PDF/X output intent print option for a job in Job Properties in Command WorkStation, Hot Folders, or a virtual printer. When you print from the printer driver, the PDF/X output intent option does not appear because jobs printed from the printer driver are always submitted as PostScript jobs. When you turn on PDF/X output intent, you must set select the Use embedded profile when present (RGB) option so that the rendering intent embedded in the PDF/X file is used. The PDF/X output intent and Use embedded profile when present (RGB) options are accessible from Expert Settings in the Color tab of Job Properties. RGB/Lab Rendering Intent The RGB/Lab Rendering Intent option specifies a rendering intent for RGB/Lab-to-CMYK color conversion. This conversion can be optimized for the type of color image being printed. To control the appearance of images, such as prints from office applications or RGB photographs from Adobe Photoshop, select the appropriate rendering intent. The C9 Server allows you to select from the four rendering intents currently found in industry-standard ICC profiles. Note: If you experience tone reproduction problems, use the Photographic setting. Rendering intent Best used for Photographic - Typically results in less-saturated output than presentation rendering when printing out-of-gamut colors. This style preserves tonal relationships in images. Photographs, including scans and images from stock photography CDs and digital camera images. Equivalent ICC rendering intent Image, Contrast, and Perceptual