Re: Adobe CS Suite and Pantone Spots
Re: Adobe CS Suite and Pantone Spots
- Subject: Re: Adobe CS Suite and Pantone Spots
- From: Chris Murphy <email@hidden>
- Date: Sat, 12 Jun 2004 13:36:32 -0600
On Jun 11, 2004, at 1:31 PM, Charles Rieger wrote:
Hello,
I was hoping some on the list here could help shed some light on just
how the Adobe CS suite handles its Pantone Spot libraries. It is my
understanding (and I may well be wrong) that Photoshop CS bases its
Pantone colors off of the LAB definitions supplied to Adobe by
Pantone. The RGB or CMYK breakdowns are then generated based on the
documents ICC profile.
Fo the solid libraries, that's correct. Unless you select a Solid to
Process library, which contain only CMYK numbers also from Pantone.
I am unclear however on how Illustrator/InDesign handle Pantone
colors. My hope was that the three apps used the same methodology to
derive the RGB and CMYK breakdowns, but apparently this is not the
case. I have read on the Adobe forums that Illustrator and InDesign
base their values from the CMYK breakdowns supplied from Pantone, not
the LAB values. This seems to make sense from what I've observed,
because no matter what CMYK profile I assign a document, the Pantone
breakdowns are always the same. But for RGB documents, the breakdowns
vary depending on the document profile.
That's right.
So it seems that for CMYK documents Illustrator and InDesign always
use the Pantone blessed values, but for RGB documents, these CMYK
value get converted to the RGB space assigned to the document. If this
is the case, does anyone know what the source space for the blessed
Pantones are, and how it is getting converted to RGB?
What happens for an RGB document, the CMYK Working Space profile is
assumed as source, the RGB Working Space profile is assumed as
destination (for ID it's the Document CMYK and Document RGB profiles
respectively which could be different than Working Space settings), and
the CMYK value is converted to RGB accordingly. You get what you get
which is usually not particularly good.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0-201-77340-6)
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