Proof-problem
Proof-problem
- Subject: Proof-problem
- From: Göran Eriksson <email@hidden>
- Date: Fri, 07 Sep 2001 17:19:55 +0200
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