U of S | Mailing List Archive | alt-photo-process-l | Re: Epson9800 and Venetian Blinds

Re: Epson9800 and Venetian Blinds

  • To: alt-photo-process-l@usask.ca
  • Subject: Re: Epson9800 and Venetian Blinds
  • From: Aaron Schramm <acschramm@gmail.com>
  • Date: Tue, 24 Feb 2009 21:19:01 -0500
  • Comments: "alt-photo-process mailing list"
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  • Reply-to: alt-photo-process-l@usask.ca

Just to add a quickie, didn't see you mention if you turned off bi-directional printing (aka highspeed)... give that a try as well.


On Tue, Feb 24, 2009 at 7:42 PM, ender100 <ender100@aol.com> wrote:
Hi Hans & Chia,

NIce to hear from you, but not so good under these circumstances.

Venetian Blinds actually run in the direction of the print head and are much wider spaced.  They are due to a fluctuation in density of the ink being laid down and are usually most visible in very light areas of even tone, such as skies.  I first noticed them a few years back on prints done by Dick Arentz with PDN.

The problem you are experiencing, even though you have cleaned your rollers sounds like—rollers.

I wonder if the rollers have become scuffed?  If you increase the inkload my guess is they get worse.

Have you tried Pictorico OHP ULTRA?  It dries faster and can take a greater inkload.

Maybe try cleaning the rollers again?  Replace the rollers?

Have you switched inks?  If so, maybe these inks don't dry as fast and are being picked up by the rollers

On Feb 24, 2009, at 6:05:57 PM, "Hans & Chia" <chiahans@pictoform.nu> wrote:

From:"Hans & Chia" <chiahans@pictoform.nu>
Subject: Epson9800 and Venetian Blinds
Date:February 24, 2009 6:05:57 PM CST
Hi all,

For a couple of years we have printed our green PDN-negs (R0 G255 B30 +15 ink) with an Epson 9800 and it has worked fine.
But suddenly it started to print vertical (paper feed direction) darker bands about 4-7mm wide, hard to say because they are very softedged.
You see them in the dark part of the neg. They are not quite regural, it reminds of the space between the suction holes but it isn't.
We print on OHP or CopyJet, uni-directional and 2880 dpi.

The triple alignment is made
Rails and rolers are cleaned
Different settings of micro weaving are tried
Different settings of suction are tried
Different settings of platen gap/paper thickness are tried
Different settings of drying time

Nothing seems to help
To print "normal" prints works.

Any ideas are welcome.

Hans and Chia

Atelier Pictoform
Hans Nohlberg & Chia N-Löfqvist
Hedåsgatan 5
SE-412 53 Göteborg

+46 (0)31 181414
Mobile: 073 974 44 24

(Besök/visit Hedåsgatan 6)