[argyllcms] AW: Re: Create RGB printer .ICM to use in Photoshop CS5
- From: "Vladimir Gajic" <vgajic67@xxxxxxxxxxxxxx>
- To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
- Date: Thu, 20 Oct 2011 10:41:52 +0200
Hi Wim,
the Idea of calibrating the printer before building a profile is simply to keep
your device in a constant printing condition. The process could also look like
this:
1. You create a printer calibration witch results in a .cal-file. During the
calibration process you also can create a Photoshop curve, witch can illustrate
the whole procedure IMHO mutch better
2. You generate a RGB-target for your profile, applying the .cal you created in
the previous step. You also can skip adding the .cal using printarg, simply
open the file in PS and apply the generated PS-curve BEFORE printing the file.
3. Generate the profile
4. The printing process could look like this:
- open your image and convert to the device profile. You will notice that the
image looks correct. This is also your softproof.
-now apply your curve. The image changes in a strange way, but will be printed
correctly.
The Idea behind: profile once, calibrate many.
Your printer may change in time. Any cartrige replacement, even if you are
using original inks, can produce colour shifts. The same applies to the
substrates you are using. In that case it's enough to recalibrate your printer
generating a new .cal and PS-curve.
There are also different ways to work with an calibrated workflow (e.g.
applying .cal using cctiff, or linking the .cal directly to the profile).
Anyway, the described procedure was for me a good starting point for
understanding the whole stuff.
Hope this helps.
Cheers
Vladimir
-- Gesendet von meinem Palm Pre
Wim Hertog <nertog@xxxxxxxxx> schrieb am 20.10.2011 10:02:
Hmm, so the profiling step alone should do the trick then? I thought profiling
only characterized the printer and you needed the calibration step in order to
actually change the printing behaviour. If the profiling step by itself is
enough to create prints matching my (with argyll) calibrated monitor, I must be
doing something wrong somewhere...
After following the tutorial and profiling the printer the gamut shape and
softproof look perfect. Very similar to what I get from PM5. The printout using
this profile results in a horrible yellow-brown cast though. I follow my usual
workflow while printing: windows CM is turned off in the canon driver and
photoshop manages colours using the generated profile. I'm pretty sure it's not
double profiling anywhere.
I must be doing something wrong somewhere but I literally read the tutorial a
100 times and tried everything and always get the same result: a strong yellow
brown cast together with totally blocked shadows.
Anyone has any idea what's happening or....a link to another tutorial to double
check?
Wim
2011/10/20 Graeme Gill <graeme@xxxxxxxxxxxxx>
Wim Hertog wrote:
> Now, the above workflow results in some strange outcomes: the colours of
> the softproof in photoshop are completely off (the same happens when I
> convert to above generated icc file). The image prints ok (ok doesn't
> mean as good as I want though), nothing like the softproof shows.
> However, when I don't add the .cal file to the icm (last step), the
> softproof is perfect but the actual printed image is horribly wrong
As suggested in the tutorial, get just profiling working first. There
are too many variable otherwise, and the first thing you do in diagnosing
a problem is break things down into individual steps anyway.
Graeme Gill.
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