Re: Hope for Epson drivers...
Re: Hope for Epson drivers...
- Subject: Re: Hope for Epson drivers...
- From: "Dan Reid" <email@hidden>
- Date: Tue, 14 Jan 2003 12:59:07 -0700
on 1/14/03 12:41 PM, bruce fraser at email@hidden wrote:
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At 11:14 AM -0700 1/14/03, Dan Reid wrote:
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>
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> Proofs in the pudding as they say. If you are happy with the output then by
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> all means continue. You're proofing requirements may not be as stringent as
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> another photographer in what you want to proof to show. That's fine. If they
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> serve the purpose well with a RGB printer workflow, then cool.
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> To hell with the science -- it's the prints that count!
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>
I have to echo John's experience. We proofed all the loose color for
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the last two editions of Real World Photoshop on an Epson 1280 using
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custom RGB profiles for the Epson and custom CMYK profiles for the
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press. They turned out to be a substantially more accurate predictor
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of the press behavior than the printer's in-house Approval system.
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(This isn't a claim that an RGB inkjet is more accurate than an
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Approval, just that we did more work setting up our proofing chain
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than the printer did.)
Great! That's fine.
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>
But any ICC conversion gets pushed through three channels, not four.
Not if you have a RIP that supports Device Link profiles. Pretty critical is
some workflows but not everybody's requirement obviously.
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I'd like an Epson NCA LUT with better gray balance and, especially,
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better linearity,
Keep asking and praying. It *could* happen in our lifetime.
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but the Epson black isn't the same color as any
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process black I've ever seen and doesn't trap like any process ink
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I've ever seen,
True.
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and the Epson isn't a CMYK printer, it's a CcMmYk
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printer. I'm really not convinced that treating it as a CMYK device
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buys anything I can't get treating it as an RGB one...
Yeah we all can agree it's a CcMmYK printer but I wouldn't profile it as a
seven color device. Remember they added the LT primaries not for extra color
gamut but to smooth out the course dots in 1/4 tones and highlights of solid
primaries.
There are a lot of advantages to being able to communicate in CMYK instead
of RGB -- calibration for one, i.e. consistency. You know the whole story on
CMYK so I won't insult you. But I humbly suggest not to dismiss CMYK
printing/profiling so quickly.
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>
Also, the only neutral BW I've been able to get from the Epsons has
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been using the Colorbyte ImagePrint RIP, which treats the printer as
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an RGB device. As always, your milage may vary.
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>
Bruce
I have prints here from a 7600 that are dead on neutral under *all* light
sources made from CMYK ICC profile. I did cheat a bit and created a "Rich
Gray" CMYK profile for conversion with IccToolBox. Absolutely no color cross
overs in my prints and this was printed from a CMYK file. I had friend
confirm this so I wasn't fooling myself.
For those that may have overlooked some basic concepts, gray balance is
achieved by either UCR or GCR (maybe some UCA) separation methods only
available in CMYK print workflows. RGB gray balance is only possible with
*true* RGB printers.
Thanks for the comments Bruce.
--
Dan B. Reid
RENAISSANCE PHOTOGRAPHIC IMAGING
http://www.rpimaging.com | email@hidden
Toll Free: (866) RGB-CMYK
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