Re: What is a good RGB RIP?
Re: What is a good RGB RIP?
- Subject: Re: What is a good RGB RIP?
- From: Damon Rando <email@hidden>
- Date: Tue, 25 Feb 2003 12:58:41 -0500
Steven,
I agree with Graeme. It is not possible to keep everything in RGB when
printing to a CMYK device. Even photographic printers use CMY. The
difference is that CMY is a direct inverse of RGB so these printers
like the Lambda are referred to as RGB devices. There is no black
generation so they can be treated as an RGB device. Any printer that is
CMYK will do black generation. IP doesn't send RGB to the printer. It
will change CMYK to LAB and then send CMYK to the printer using its own
"black box" black generation.
This problem was exactly the problem encountered by so many of us in
the early days of color management back in '95 to '98. Most of the RIPs
on the market had this "black box" black generation that was very
difficult to control. We dreamed of an RGB workflow that was very
different than the RGB workflow pushed by a few on this list. The RGB
workflow pushed by some on this list is the problematic workflow that
we encountered years back (I know some won't agree. But most of the
seasoned consultants will.)
The RGB workflow we dreamed of is now possible. You simply turn off all
calibration and profiles. You calibrate the printer. You print profile
targets with this new calibration. You set the profile with the
calibration. You drop in an RGB file with an embedded profile and the
RIP automatically converts to CMYK based on the source and destination
profile. This is the dream RGB workflow. This gives you total control
of your printer to convert to CMYK using the black generation that you
find as optimal. This gives very tight profiling and linearization.
This is an optimal ICC workflow.
I understand the problems you are having with the BestColor
PhotoExposure. I can send you to a consultant that has much experience
with this product that can explain why you are having this problem. He
will probably suggest that you do look for another RIP. Don't move to
an inferior workflow. The company I work for sells a RIP that uses the
optimal workflow described above, ErgoSoft PosterPrint. That is why I
work for this company. If not our product, consider ColorBurst or Onyx
they work in a similar manner. Ours just has a little more power and
many think is easier to use.
Regards,
Damon
Damon Rando
Business Development
ErgoSoft US LLC
RIPs for Creative Professionals
email@hidden
www.ergosoft.ch
On Tuesday, February 25, 2003, at 01:00 AM, Graeme Gill wrote:
Message: 1
Date: Tue, 25 Feb 2003 14:22:55 +1100
From: Graeme Gill <email@hidden>
To: email@hidden
Subject: Re: What is a good RGB rip?
Steven Kornreich wrote:
excelent. What gives. So now I am thinking differnent. What about a
RIP
that works with RGB profiles and keeps everything RGB. Any advice?
I think you're heading in the wrong direction. You seem to have
a poor RIP/bad configuration/bad profiles/faulty device, nothing
to do with the colorspace it drives the printer in. Generally it's
better to convert directly to the printers native colorspace in the
RIP, rather than indirectly via someone else's color transform
(which is what's going to happen using the Epson drivers). Having
looked at some of the profiles made in the Epson RGB space, it
would seem you will be sacrificing a noticeable volume of color
gamut, as well as any possibility of calibration. Certainly the
results I've seen out of our 10600 are spectacular, and we always
drive it directly in CMYKcm.
Graeme Gill.
On Monday, February 24, 2003, at 09:49 PM, Steven Kornreich wrote:
Message: 13
From: "Steven Kornreich" <email@hidden>
To: <email@hidden>
Subject: What is a good RGB rip?
Date: Mon, 24 Feb 2003 16:40:28 -1000
Well this is kind of a goofy question but here is where I am at.
I have been a BestColor Customer for almost three years now. I own
three
copies of BestColor PhotoExposure, four epson 9000's and I just got a
Epson
10600 with UltraChrome Inks. I purchased this printer for printing on
Canvas
only.
I have been up to date getting excellent results with my 9000's and
BestColor, but after spending all weekend with Best and my 10600, I
give up.
The output looks bad. Just for the hell of it I created a RGB profile
using
Gretags TC9 RGB chart and created a RGB profile using PM 4.1.1 and
printed a
test file direct from PhotoShop using the Epson 10600 driver. Results
were
excelent. What gives. So now I am thinking differnent. What about a
RIP
that works with RGB profiles and keeps everything RGB. Any advice?
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