Re: Why don't drivers use a CMYK profile?
Re: Why don't drivers use a CMYK profile?
- Subject: Re: Why don't drivers use a CMYK profile?
- From: email@hidden
- Date: Wed, 8 Nov 2000 19:11:21 EST
In a message dated 11/8/00 5:35:33 PM, email@hidden writes:
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Historically, QuickDraw based printer drivers have always used RGB profiles,
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and converted to CMYK using algorithms internal to the driver. Thus, the
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print job goes from RGB to RGB to CMYK.
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If the images being printed are tagged with source profiles (they can be),
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and the printer driver receives the source profiles with the print job
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(they
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do), why don't any of the current inkjet drivers use a CMYK output profile
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and let ColorSync do the conversion from RGB to CMYK, thus removing a step
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from the process and allowing advanced users more control?
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It seems like an obvious thing, but nobody does it. Is there a good reason?
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The location at which the RGB driver profiles are applied (before the
screening) is not a place where CMYK profiles could be used; for that a
non-OS level printing system (PostScript or an application specific CMYK
driver) would need to be used. CMYK control can be provided without
PostScript, but it is application specific and problematic.
C. David Tobie
Design Cooperative
email@hidden