Re: digital press proofing profile?
Re: digital press proofing profile?
- Subject: Re: digital press proofing profile?
- From: Tyler Boley <email@hidden>
- Date: Thu, 30 Jun 2011 13:41:59 -0700
Hi Tom, just trying to use whatever tools I can to help prep the files.
I don't really need to simulate with my inkjets for hard proofs for all
the reasons you mention, and realize there are severe limitations to
this idea. But if I could soft proof a bit better, I thought there may
be some way to get a bit of help from a profile... but you are
confirming my thoughts...
I have sent several test images and already have one book in the works.
It's pretty good but there are some wacky things going on down near
black I haven't been able to avoid, and just a few gamut clipping issues.
Thanks,
Tyler
Thomas Lianza wrote:
Hi Tyler,
What are you trying to achieve? Are you trying to build a workflow that
will allow you to visualize the printed page on a display? Do you want
to build a workflow that allows you to print a page on an inkjet printer
to simulate what will print in the book?
If they are looking for Adobe RGB images, they probably have a link
profile that maps the ARGB to their printer device space using some
arbitrary form of gamut mapping and tonal response. This would not
necessarily be a standard ICC profile. If they are using a standard ICC
workflow, they should be able to send you an output profile which you
could use for simulation in photoshop. I don't think that sending a
target tagged as ADOBE RGB would buy you too much because the color
management is already concatenated into a single transformation. The
problem that you have here is that the output data is already mapped
through a transformation so the gamut mapping is already in place. I
don't think a profile produced with this data will necessarily yield
good simulation results. You are essentially trying to profile a system
that is applying gamut mapping to the output data. Not a good idea.
Send some test images and visually evaluate their process.
Regards,
Tom
-----Original Message-----
From: colorsync-users-bounces+tlianza=email@hidden
[mailto:colorsync-users-bounces+tlianza=email@hidden] On
Behalf Of Tyler Boley
Sent: Thursday, June 30, 2011 4:15 PM
To: ColorSync Users Mailing List
Subject: digital press proofing profile?
I am starting occasional work with one of the POD book publishers. They
are one of the better ones and the work looks good, but obviously it
gets down to file prep. Their process details are unknown to me, though
they state a lot of ongoing calibration including color management. I
choose not to push for info about that, and demonstrate respect for
their stated expertise. They offer test prints, and I mentioned I may
slip in a profile chart, they expressed no concern about that. So far
they are asking for color prepped in AdobeRGB and tagged as such. Since
I have no idea what conversions are going on between tagged RGB and ink
on paper there's no real way for me to determine device color. So, if I
send an RGB chart in as a color test, tagged AdobeRGB so it is treated
exactly as images would be, how can I make the best use of the resulting
profile? For example, can I use it to soft proof using "preserve
numbers" while prepping ARGB files? Since it will be a profile made from
a chart that was converted from AdobeRGB at their end, it seems there
would be a missing step using it for file prep that will limit
usefulness...
I realize I could push for more info that may result in a more useful
profile but I know what it's like to have clients talking to me like
they know more about what I do and I, so prefer not to go there for
now...
Thanks,
Tyler
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