CMYK and Linux

CMYK and Linux

[Jan Heinen]

I am working with Linux and it seems to be a littlebit 
difficult to test if a resulting PDF from Context is cmyk (I 
don't have Adobe).

With the frontend "display" from Imagemagick I get the 
following information about the pdf:
Type=PaplatteMatte
Colorspace=RGB
Debth=16/8-bit

Hasn't the PDF to be Colorspace=CMYK?
Here is what I did:


\setupcolors[state=start]
\definecolor[myc] [c=.30, m=.60, y=.60, k=0]
\starttext
{\color[myc] Only some words}
\page
\stoptext


Ho can I say to ConText: This PDF has to be CMYK?

Regards
Jannis

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Re: CMYK and Linux

[William Adams]

On Jan 6, 2012, at 11:23 AM, Jan Heinen wrote:

> Ho can I say to ConText: This PDF has to be CMYK?

You did, the tool you specified isn't doing a good job verifying that.

The folio is Gray Color, brightness 0, the colour text is c30 m60 y60 k0 as expected (as checked w/ Enfocus PitStop).

Acrobat Reader has some preflight capabilities --- check that. See:

http://beckerprint.com/resources/

which has:

Preflighting your PDFs

In many cases, issues within PDF files can be found through Acrobat and Acrobat Reader's Preflight tool. The Preflight tool analyzes your PDF and returns a report listing potential problem areas within the file, including images in non-CMYK color spaces, colors within the document that are not CMYK, low-resolution images, layers that don't knock out, and so on.

Preflighting on a Mac:

	• Open your PDF in Acrobat or Acrobat Reader.
	• Go to Advanced → Preflight.
	• Choose your desired Profile preset.
	• Hit Preflight.
	• Adjust your source files accordingly.
Preflighting on a Windows computer:

	• Open your PDF in Acrobat or Acrobat Reader.
	• Go to Document → Preflight.
	• Choose your desired Profile preset.
	• Hit Analyze.
	• Adjust your source files accordingly.

Not sure if the Linux version of Acrobat Reader has such capabilities or no --- perhaps Ghostscript has some facility at this?

William


-- 
William Adams
senior graphic designer
Fry Communications
Sphinx of black quartz, judge my vow.

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If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
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