Clay, and all...
I got some acetate today and sprayed it... a light coat on each side.
Taped it to the underside of the glass and pulled a vacuum in the
NuArc, over a piece of pictorico ohp and an imagesetter film, and NO
rings visable. In the past, I have had edge-to-edge little glowing
rings all over the film and ohp, so YAY!!!! So far so good... now to
go make an exposure and a print... i'll be back...
On 4/3/07, email@example.com <firstname.lastname@example.org> wrote:
> I noticed the problem when printing palladium from diginegs on the new
> 'improved' Pictorico Ultra. The back (non-inked) side was giving me some
> interference patterns that would occasionally be noticeable in smoother
> toned areas of my prints. The old stuff did not do this.
> At first, I assumed the problem was paper sizing or some other 'not my
> fault' factor. They were lighter toned areas that looked like little dots
> and wiggles in the middle of dark areas on the print. I could almost
> always fix them by retouching, but after the subject came up a few weeks
> ago, I put on my Sherlock Holmes deerstalker hat and UV blocking
> sunglasses and observed what was going on in my exposure unit as the
> vacuum drew down. Surprise! The irregularities were in the same spots as
> the the funky patterns I could observe between the vacuum frame glass and
> the back of the negative.
> I tried cursing and incantations to no avail. I finally took a hint from
> the KM73 crowd and used a blow dryer to hot-air dry the negative to
> Sahara-like aridity just before exposure. This helped somewhat, but not
> entirely. I now have some of the acrylic spray that I intend to spray on
> the back of a negative to see if this will get me the rest of the way. I
> will report if this is successful.
> As I said on the hybrid forum, I could really learn to hate this pictorico
> Ultra. Unfortunately, I cannot locate a source for the old stuff in 24
> inch rolls.
> > Jeremy,
> > Thanks for the tip. I can't find the time to go back over all the
> > messages
> > on hybrid right now, so one quick question: what processes were people
> > having Newton rings with--solarplate or other alt as well? I did not know
> > Sandy was doing solarplate, nor Clay, so it is happening with other
> > processes, too?!
> > Chris
> > ----- Original Message -----
> > From: "Jeremy Moore" <email@example.com>
> > To: <firstname.lastname@example.org>
> > Sent: Tuesday, April 03, 2007 9:50 AM
> > Subject: Re: solarplate wedgies
> >> Christina,
> >> There's a long thread over at Hybridphoto.com where Sandy King seems to
> >> have
> >> come up with a solution. I know that I am getting the newton rings in my
> >> prints using the vacuum frame of a NuArc and Clay Harmon spoke up that
> >> he's
> >> getting them with his Amergraph vacuum frame. I believe Susan said she
> >> is
> >> getting them with the sheets of Pictorico, but I'm only getting them
> >> with
> >> the pieces cut down from the "NEW and IMPROVED" (my ass) Pictorico Super
> >> Fantastico Ultra (or whatever it's called)--I believe Clay's problem is
> >> also
> >> stemming from the new rolls.
> >> Here's a link to the thread on HybridPhoto:
> >> http://www.hybridphoto.com/forums/showthread.php?p=3013#post3013
> >> -Jeremy-
> >> On 4/3/07, Christina Z. Anderson <email@example.com> wrote:
> >>> Susan,
> >>> You mean to tell me that even with a vacuum frame you are still having
> >>> this
> >>> as a major problem? Will it never end? I can feel your pain. There
> >>> have
> >>> been several times I have felt like giving up. Or, at least, sticking
> >>> to
> >>> busy images with no appreciable large areas of dark.
> >>> Chris
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