Re: Colorsync-users Digest, Vol 6, Issue 235
Re: Colorsync-users Digest, Vol 6, Issue 235
- Subject: Re: Colorsync-users Digest, Vol 6, Issue 235
- From: Mike Strickler <email@hidden>
- Date: Fri, 25 Sep 2009 00:19:39 -0700
Hi John,
I can answer this because I've actually made profiles for a
commercial lab. In this case the goal was to provide the lab itself
with custom profiles for converting customer-supplied files to the
printer's native output space with several different Fuji papers plus
a Kodak Endura metallic. I had access of course to the lab and the
printer's workstation. The RIP had clear, logical color management
settings much like any RIP or Photoshop. We turned off CM and output
a custom RGB target and profiled the device (a Chromira) just like
any RGB printer--no big deal. All incoming files were subsequently
converted to these profiles for output. These profiles were also
supplied to customers who were interested in improving their soft
proofing or performing their own conversions to get a preferred print
price.
As others have alluded, the difficulty comes in when you do not have
access to or knowledge of the color management being employed in the
lab. The worst situation--impossible, really--is, as Ray Maxwell
said, when some sort dynamic color adjustment is being employed. This
sort of image-by-image "optimization" defeats all attempts to color
manage from your end, so just forget it. On the other hand, if the
system applies the same conversion or adjustment to every image you
have a steady condition you can profile. You might be profiling on
top of another profile, but it can still be useful for your own soft
proofing.
Mike
------------------------------
Message: 4
Date: Thu, 24 Sep 2009 15:11:23 -0500
From: Jon Crook <email@hidden>
Subject: Profile of a photo lab
To: ColorSync <email@hidden>
Message-ID: <C6E13C9B.138A%email@hidden>
Content-Type: text/plain; charset="US-ASCII"
How would one make a profile of the output from a photo lab? My first
instinct would be to send an ECI or IT8 target to the lab and make
a printer
profile of the print that comes back but the photos must be in RGB
going to
the lab. What would be the proper procedure for this?
-
Jon Crook
Director of Color Management
Corporate Image
www.corp-image.com
800.247.8194
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