anti-newton glass in a condenser enlarger

[douwe]

I use a Durst m605 condenser enlarger and print tmax film, mostly TMY2, in a glass negative carrier. The top glass is AN coated, and the structure ends up in my prints. Just like here:

http://www.fotoroberto.com/tech/antinewton_issue.htm

If I use a regular piece of glass, I get Newton rings. If I don't use a glass carrier at all, corner sharpness suffers. :bang:
Has any of you got a clue how to avoid this problem, or is a diffusion enlarger head my best bet?

 

[rlouzan]

Use painters tape to stretch the negatives.

 

[pau3]

What kind of AN glass are you using? Is it the standard provided by Durst?
It looks too rough to be a normal AN.

I use quite often AN, but not always, and there is no visible difference in the
prints. It's true that my enlarger is a diffuser one, but I use to have one
with condenser, and I had no problems whatsoever (with AN).

Best,
Pau

 

[MartinP]

It looks as though it is anti-reflective picture-framing glass, rather than anti-Newton glass ! Is it definitely the Durst item rather than a self-made substitute ?

 

[oftheherd]

Use painters tape to stretch the negatives.

That should work, but a proper negative carrier should work well too. Do you have a metal negative carrier?

 

[douwe]

I use the original equipment, the negative carrier came with the enlarger and is 100% metal. The glass is original durst sivogla AN.
I know that the tmax films have a very shiny base, but still, I can't be the only one with this problem!

 

[dfoo]

I have the opposite problem. A glass carrier and newtons rings. It sucks! I was hoping to get some anti-newton glass, but now I'm thinking otherwise.

 

[tlitody]

I have some Durst AN glass and it shows a mottled pattern in the print. This is on a diffusion enlarger.
Not all AN glass is equal. I had this discussion with someone else who had the same problem on a durst. But he also uses a Devere enalrger and told me that with the devere AN newton glass he has no problem.

So as a suggestion which I haven't tried, get yourself an Anti Newton glass for a devere 4x5 or bigger and cut it down to fit your durst.