Thread View: adobe.postscript.programming
4 messages
4 total messages
Started by mark kaz
Tue, 18 Jun 2002 14:55
screen prining help!!!!
Author: mark kaz
Date: Tue, 18 Jun 2002 14:55
Date: Tue, 18 Jun 2002 14:55
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Can some one explain how I would start with a cmyk jpeg and turn it into a 4color seperation for screen printing. I have a postscript 2 printer. The directions in the book for me are useless. Please help
Re: screen prining help!!!!
Author: Aandi Inston
Date: Tue, 18 Jun 2002 16:16
Date: Tue, 18 Jun 2002 16:16
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I would open it Photoshop, save as a level 1 EPS, place into PageMaker or QuarkXPress or InDesign, then print. If you are looking for a programming trick to make separations, this is not a couple of lines but a major programming effort. Aandi Inston
Re: screen prining help!!!!
Author: Gunnar Fing Blodgett
Date: Wed, 03 Jul 2002 20:39
Date: Wed, 03 Jul 2002 20:39
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mark Aandi is (as always) quite right. JPEG is essentially an RGB format, which doesn't separate in a CMYK colorspace. I would not want to think about wrapping a JPEG within a CMYK separation method. Gunnar
Re: screen prining help!!!!
Author: Dov Isaacs
Date: Thu, 04 Jul 2002 02:11
Date: Thu, 04 Jul 2002 02:11
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Actually, Aandi did NOT say that "JPEG is essentially an RGB format." It absolutely isn't. JPEG-encoded images can be RGB or CMYK! And JPEG-encoded images in PostScript Level 2 may be RGB or CMYK. Adobe PostScript Level 2 doesn't automatically and globally provide for support for separations, although Adobe PostScript 3 does require such device support. The problem is when applications attempt to perform separations. Some, such as Quark XPress, have major problems with EPS files other than PostScript Level 1 and I believe that is exactly what Aandi was hinting at in his response. By creating EPS as Level 1, the possibility of JPEG encoding/compression is eliminated. - Dov
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