Re: Use of Ultrachrome inkjet proofs in production environments
Re: Use of Ultrachrome inkjet proofs in production environments
- Subject: Re: Use of Ultrachrome inkjet proofs in production environments
- From: Andrew Rodney <email@hidden>
- Date: Wed, 07 Apr 2004 16:21:20 -0600
on 4/7/04 4:15 PM, Marco Ugolini wrote:
>
Andrew, based on your experience, how long does it take, on average, for
>
proofs made with Ultrachrome pigment inks to dry down, stabilize and show a
>
reliable appearance?
Visually you can almost look at them as they come out of the printer. If you
measure a lot of patches, you'll see that depending on the color of the
patch, total dry time might take quite some time. I know Bruce Fraser did
some tests where certain solid greens took days to fully stabilize. But
compared to dyes (which you can see change as you look them just out of the
printer), I think the Ultrachrome are pretty useable right away.
>
Put another way, how much do prints made with these inks shift, and when do
>
they stop shifting? If we were to gauge it, which colors shift the most and
>
to what degree?
The only way I've been able to detect this change is to measure a good 900
patches right after the print comes out of the printer and then an hour
later, then an hour after that and so on. Then I can compare the delta using
ProfileMaker's MeasureTool in compare mode. Again, some patches are going to
stand out but over all, the average delta's are pretty low between out of
the printer and an hour later (if memory serves me, the average was around 3
or less). After all, at some point you do have to look at the darn print
right? The paper used also can play a role.
>
In production environments it is highly impractical to ask designers to wait
>
a couple of hours, or three, before they are able to see a "stabilized"
>
print.
I don't really think so.
>
Is there really such a visibly dramatic shift in color and tone that, if I
>
show a designer an Ultrachrome inkjet proof made, say, 10 minutes ago, it is
>
bound to lead to DRAMATICALLY wrong results? Or just SLIGHTLY wrong, within
>
acceptable margins?
In my experience with the papers I've used (which by the way were not made
for proofing), the differences are pretty slight.
Andrew Rodney
http://www.digitaldog.net
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