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: "Ernst Dinkla" <email@hidden>
- Date: Thu, 8 May 2003 10:07:15 +0200
----- Original Message -----
From: "bruce fraser" <email@hidden>
To: "Andrew Rodney" <email@hidden>; "Cris Daniels"
<email@hidden>; <email@hidden>
Sent: Wednesday, May 07, 2003 7:08 PM
Subject: Re: Review of Large-Format Inkjet Contract Proofers
>
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
Is there any acceptable forced method to dry the targets +
proofs? I'm using an old hair dryer (helmet type) with some
holes made at the sides to let the air out. But I wonder what the
temperature increase does and whether the inks stay more at the
top than in a normal room temperature dry period. Any experience
with measurements in those conditions ? So far used that method
with Generations 4 pigments on art papers. I do remember some
messages describing that a magnetron was used for drying targets.
Ernst
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