Re: PROFILING WITH COLORTRON
Re: PROFILING WITH COLORTRON
- Subject: Re: PROFILING WITH COLORTRON
- From: Wim Melis <email@hidden>
- Date: Tue, 29 May 2001 03:51:00 +0200
>
I have a Colortron II that I bought about three years ago.
>
According to X-RITE literature, it can be used for making printing profiles
>
with Photoshop,
It's far from perfect but as a starter tool it can be useful, provided
you keep it stable. A big problem is the drift: as the instrument warms
up, measurements start to deviate. (Just measure the same gray patch a
hundred times in a row, you'll see what happens.)
I got acceptable print profiles using this routine:
1) Take about ten dummy measurements before starting the actual
measurements, as sort of a 'pre-heating'.
2) Performing a fresh black-white calibration.
3) Take your real measurements, but after each 30 or so patches, do
another black-white calibration.
This trick keeps the device reasonably stable. Our lithographer (from the
pre-colormanagement generation) was even very happy with the profiles I
made that way...
Wim
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