Re: Review of Large-Format Inkjet Contract Proofers
Re: Review of Large-Format Inkjet Contract Proofers
- Subject: Re: Review of Large-Format Inkjet Contract Proofers
- From: bruce fraser <email@hidden>
- Date: Wed, 7 May 2003 10:08:04 -0700
At 10:12 AM -0600 5/7/03, Andrew Rodney wrote:
on 5/7/03 9:58 AM, Cris Daniels wrote:
I've done enough testing internally as has Colorbyte to validate that
there are easily measurable differences with the Ultrachromes until
about 20-24 hours.
Can't detect that on the papers I'm using. The deltaE difference out of the
printer and hours latter was tiny. Maybe with some glossy 3rd party papers.
I'm using an iCColor device to do a good deal of averaging per patch.
The drift is there, but you have to look for it quite carefully. With
UlltraChrome on the Epson Enhanced Matte and Premium Luster papers I
can measure shifts of about 2-3 deltaE over the first 24 hours,
mostly in the greens (cyan and magenta shift in opposite directions).
You won't detect it if you only measure the primaries -- I found it
by keeping the Bill Atkinsons 918-patch target on the Spectroscan and
re-measuring for 24 hours. 3 deltaE isn't a lot, but when it's on a
profiling target, the difference can easily get amplified. I'd have
to agree with Cris on this one.
That said, I haven't found any inksets that do noticably better, and
a good few that do much worse. I gave up measuring Canon dyes after a
week because they were still changing...
Bruce
--
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