Newtons rings

[dfoo]

I've noticed on some (but not all!) of my prints I'm getting some newtons rings. I have a glass carrier in my Durst M600, and I guess the glass isn't anti-newton glass. What can I do, short of changing the glass, to avoid this?

[fbf]

put the film under heavy books for a week or two then scan it without glass carrier.
When I had 8000/9000ed, I have noticed newton rings With the glass carriers so I stopped using it.

[Finder]

There is not much you can do. You can try cleaning the film with film cleaner to see if you have a thin coating of something on the film. But the best way is to use a glassless carrier.

[dfoo]

I found out what was causing the rings last night when printing. Basically, I was cleaning the glass with an anti-static cloth and the cloth has some sort of liquid embedded in it. The residue left on the glass after cleaning causes rings when I press the glass against the negative. Cleaning the glass with some windex got rid of the residue and the rings.

[degruyl]

Originally Posted by dfoo

I found out what was causing the rings last night when printing. Basically, I was cleaning the glass with an anti-static cloth and the cloth has some sort of liquid embedded in it. The residue left on the glass after cleaning causes rings when I press the glass against the negative. Cleaning the glass with some windex got rid of the residue and the rings.

What brand of cloth, if you know? (so that I can avoid it)

That sounds distinctly like something that should not be anywhere near optics.

[dfoo]

Originally Posted by degruyl

What brand of cloth, if you know? (so that I can avoid it)

That sounds distinctly like something that should not be anywhere near optics.

I can't remember the brand. I bought it from Henry's in Toronto. I'm not longer so sure that is the issue... I can plainly see the rings if I put the neg in the carrier and shine a strong light on the carrier. It is very irritating and sometimes ruins my prints.

[KeithCostin]

I experienced this problem just a few days ago too. I use a V700 and betterscanning.com's ANR glass insert thingies. They work most of the time, but sometimes this happens: http://www.flickr.com/photos/godzilla128/4519219707/
Since this IS anti-newton glass, my only guess is that it's either sticking (like yours) or bending weirdly under the weight. My film damn near curls into half-circles tho, so I might go with the "heavy books" method too.

[pau3]

IMO, anti-Newton rings glass is really inexpensive, compared with the rest
of our gear. And they do improve the prints. Have you considered buying one
for your enlarger?

Best,
Pau

[dfoo]

Yeah, I'll probably order some glass for both of my enlargers.