Re: Disable Colorsync in a Postscript printer
Re: Disable Colorsync in a Postscript printer
- Subject: Re: Disable Colorsync in a Postscript printer
- From: Roger Breton <email@hidden>
- Date: Sat, 10 Nov 2007 22:17:13 -0500
Lorenzo,
> Thank you. I already configured the printer as "CMYK device" but I don't
> know how Acrobat is sending the data to the printer, if is RGB or CMYK.
If the data in the PDF being printed is CMYK Acrobat has no reason to
convert it unless you specifically direct it to do so.
> The only application I believe is sending CMYK is InDesign as the
> printer dialog box is quite different from Photoshop or Acrobat
> (Professional or Reader) and have some CMYK features. That's why I'm
> trying to bypass the driver and send a "plain" postscript file to the
> printer.
According to HP's User Guide, when 'Device' is selected in the driver, it
does not matter if the data is being sent by the free Adobe Reader or Adobe
Acrobat Pro as both apps *do* download the same color data to the printer. I
don't think you need to try to bypass anything at this stage. Put together
some sample CMYK objects in InDesign, export to PDF with 'Leave Color
Unchanged', open and print from Adobe Reader or Acrobat, you can be sure the
data will not be tampered with colorwise.
> I'm also not comfortable with the built-in color conversion tool in
> Acrobat Professional and the print dialog, both seem to simple to me.
They do the job they're intended for. No?
> For instance, the built-in color conversion tool doesn't have a
> rendering intent selection option
Because the RI is coming from the profile's default RI. Weird but that's the
way it is.
> and the print dialog doesn't allow you
> to choose the printer's profile.
Printing from Acrobat seems easier than it really is. Just realize that you
can have all kinds of garbage in a PDF and you'll see why it's not so
simple. Like, you could be printing to RGB or CMYK or to both RGB and CMYK.
Take the case of PDF/X-3!
> To overcome all these limitations and uncertainties, I decide to try
> this "unusual workflow" using a pdf color conversion tool, a PDF to
> postscript conversion and a direct path to the printer.
The Callas color plug-in is good. It should help you.
> Lorenzo
Roger Breton
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