[argyllcms] Re: spotread filters
- From: "Jacques Warnon" <j.warnon@xxxxxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Fri, 6 Jun 2008 10:12:00 -0400
Thanks Graeme. spec2cie. I think I can handle that. And I see that I can
even make some of my own Sp files for that, so maybe I can finally work
something out for my own special needs.
Yes, the meters have been a huge concern. After a lot of complaining to
X-rite (since they told me the i1 would be the best meter for sublimated
fabrics), they did some measurements for me with polarized meters, spherical
meters, uv meters, and a few combinations of those, many of which of which
would be pushing the limits of my budget. But none really made much of a
difference, and the more expensive spherical meters were not compatible with
their profiling software anyway.
However you aren't the first person to mention the spectrolino, and I have
been scouring ebay in an attempt to find one.
My best luck so far has been to profile with as few patches as possible, and
go in and hand edit for the highlights. Either in the measurement files, or
more recently using Profile Inspector. Not a very elegant procedure, but at
the end of the day, I have to keep printing.
Thanks for sending me in the right direction.
Jacques
-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of Graeme Gill
Sent: Thursday, June 05, 2008 9:34 PM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: spotread filters
Jacques Warnon wrote:
> Thanks Graeme, I guess that's a little out of my league for the time
being.
> I got really excited when I first read about Argyll's custom FWA
> compensation when used with profile. But since I'm profiling a CMYKRB
> printer, I realize now I can't profile with Argyll. So when I saw the
> option to put in a custom filter at the measurement level, I just wanted
to
> find out what that was about. Seems like I will still be editing
> measurement files in excel for the time being.
You can apply Argyll's FWA compensation without using Argyll's profile
making. Simple use spec2cie on the spectral .ti3 files, then convert
the resulting CIE tri-stimulus values into whatever format you like.
It won't help if it's not a Fluorescent whitener effect though.
> I have asked this question to Gretag/Xrite before with no real luck, but I
> will post and see if anyone has an idea. Our printing media (sublimated
> polyester) seems to wreak havoc on colorimeters, especially in the
> highlights. It seems similar to the effect of optical brightening agents,
> but much more pronounced. Profilemakers optical brightening option
doesn't
> fix it, and a borrowed UV cut i1 didn't help either. If I were to put it
in
> simple terms, I feel like I need to calibrate my i1 spectrometer to my
> media. But how does one go about calibrating a calibration device? It
> seems to work well on coated papers, but fabrics are a different story.
You need to figure out what the effect is. If it's fabric you are dealing
with, then it could be gloss that's an issue. Have you tried using a
polarizing
filter for instance ? (the Spectrolino has one).
I understand that those working seriously with fabric and color will have
instruments other than a graphic arts 0/45 degree instrument available to
them,
such as integrating sphere instruments. Maybe something like that is
more appropriate for the kind of work you are doing ?
Graeme Gill.
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