AW: Proof-problem
AW: Proof-problem
- Subject: AW: Proof-problem
- From: Ulf Grossmann <email@hidden>
- Date: Fri, 7 Sep 2001 20:57:00 +0200
Hi Gvran,
we had done the "fading test" for many papers with the Epson DYE Inks. athe
paper you use Best Proofing Paper 6150 Semimatt (this is the paper Andrew
told about from Mitsubishi) and Best Proofing paper 5165 matt is one of the
papers which reduce the effect, but the SemiMatt Paper will be not more
availible in next year. We have a new Paper, which is designed completly new
Best Proofing Paper 9180 SemiMatt will be our RemotePaper, all Papers have
now a Backprint.
The difference to the old paper is: nearly no optical brightner; WhitePoint
(Lab) 96.5 0.5 -1.5 (not so yellowisch like the DuPont Paper). The Best
Proofing Paper 9150 (9180) SemiMatt
But now back to your problem. The Fading to Yellow is realy a problem and it
depends on the Inks. The ColorFast Inks from EPSON are very stable but also
very metamerism, but I am sure, that EPSON will offer a good solution in the
future. The DYE Inks inside the EPSON SP10000 are much more stable.
For getting a stable Proof you must control many things:
1. The Total Inkamount. If the Total Inkamount is to high you increase the
Fading dramaticaly, in numbers: from Delta E 2-3 to Delta E 5-6
2. the dryingtime: the print should dry 3 hours befor covering with anything
3. you should wait min. 1/2 hour after printing your profiling chart before
creating your profile.
If you have more question visit also our forum at our Webside
www.bestcolor.com
best regards
Ulf Grossmann
-----Originalnachricht-----
Von: Gvran Eriksson
An: email@hidden
Gesendet: 07.09.01 17:19
Betreff: Proof-problem
Hi. I work on a small pre-press department with some high quality
customers.
I have a problem with our Epson 9000 with the BestColor RIP.
We purhased this a year ago, and it works nicely. The problem are the
Calibration. We use Epsons own standard ink, and 2 qualitys of paper.
One
called semimatt 6150, and one matt 5165. (Coated & Uncoated)
The problem is this:
When all is calibrated and fresh we print out a testpage. This page has
also
been printed in our Heidelberg press. Its not a perfect match, but
close.
A day later the Epsonprinted page has a lot more yellow tone....and I
mean a
lot.
I have measured areas in it hour per hour with a spectrophotometer, than
translated these values to cmyk. The first three hours some areas
changed up
to 6%....This may not sound so much, but its a catastofy in neutral gray
parts. The yellow effect slows down after 24 hours. Than it is more or
less
stabile. (I always makes new outputs if a month has past)
Now we always have to turn down yellow in output, than wait atleast
three
hours before show it to a customer.
Of course the equipment is a nightmare to calibrate properly.
First question: Has anybody ells experienced this?
Second: If so, how do you handle this?
Third: Why does this happen? Is it paper or ink?
/GE
_______________________________________________
colorsync-users mailing list
email@hidden
http://www.lists.apple.com/mailman/listinfo/colorsync-users