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"Jon Bamsey" <[EMAIL PROTECTED]> schrieb/wrote: > I accept Dov's point re composite colour for photocopiers etc, and > indeed on some imagesetters it is possible to set up drivers which will > separate spot or cmyk colours when RIPping a composite file. > However, to separate for litho printing there are a few options. > 1. Import the PDF file into Quark (need plugin) and run separations to > an imagesetter from there. > 2. Export as eps from Acrobat (as level 1 ps), import into Quark as run > seps as above. (more steps but no need for plugin) > 3. Use a PDF plugin utility such as PDF Output Pro, or Crackerjack. > > Regs > Jon B Jon, have you really been successful in using methods 1 and 2 as as the placed used PDF files contained RGB color (which is the case as soon as it origins from a Windows GDI application like the Microsoft Office apps or Microsoft Publisher)? If you place a RGB PDF file into QuarkXPress you get nothing else as a RGB PostScript level 2 EPS file (that's the way the QuarkXPress PDF import works). I hope you agree that QuarkXPress neither is capable to separate a RGB EPS file nor a level 2 code in a usable way. Simply try to on-host separate a Adobe Photoshop RGB EPS image and look at the separation result from QuarkXPress. The only way I can think of is to use a in-RIP separation approach. If you produce a PostScript level 1 EPS file out of Acrobat 5 on the other hand (I didn't test this yes in Acrobat 6) you have to select the 'Embed RGB and Lab' option as soon as RGB images are inside the PDF file. Otherwise Acrobat will refuse to export as level 1 code (which is absolutely necessary to do a correct on-host separation). As the option name implies you'll end with an EPS file which includes RGB image data. So the best way to solve this RGB problem is to do a color space transformation to CMYK on PDF level and export/save a PostScript Level 1 EPS if on-host separation is used or a EPS with the PostScript level of your RIP if in-RIP separation is used. This EPS can then be placed inside the layout app. There are several tools available for PDF based color space transformations like Enfocus PitStop 5 Professional, Quite A Box of Tricks and the most powerful of all which is Heidelberg Supercolor. Regards Robert Zacherl -- ***************************** Robert Zacherl IMPRESSED GmbH Tel:++49(0)40/89 71 89-0 Fax:++49(0)40/89 71 89 71 eMail: [EMAIL PROTECTED] http://www.impressed.de ***************************** To change your subscription: http://www.pdfzone.com/discussions/lists-pdf.html
