[pure-silver] Re: newton ring problem figured out

Shannon....
Sorry... But I have two pieces on anti-newton glass in my Durst enlarger. 
In both cases the 'rough' (read textured surface) The have "been there"
since its acquision. The only time they are removed is when negatives
smaller than 4x5 are being enlarged, although occasionally I will place a 
120 neg in there and use the masking blades to reduce light spill

In the 30+ years this enlarger has been in use I have never observed a
blurry image due to the anti-newton glass.

Ken
On 22-Jul-07, at 10:37 AM, Shannon Stoney wrote:
No, because then the projected image would be blurry. The anti- newton glass goes on top, as established in our earlier conversation about this. It's just that the rough side should be in contact with the negative, not the smooth side. 

--shannon


On Jul 21, 2007, at 4:06 PM, hksvk wrote:


Maybe the top glass should be on bottom?   ---Harry

-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Shannon Stoney 
Sent: Friday, July 20, 2007 12:09 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] newton ring problem figured out


A few months ago I posted a question about what was causing a weird
white ring on my prints. It was diagnosed as a symptom of Newton Rings, 
and then the question was:  why did the Newton rings form?  I had to
leave Houston where my darkroom is for a few months, but last weekend I 
was back in Houston and I investigated the problem further. I found
that the glass carrier does have anti-newton glass on top, but the
glass is beveled so that the rough side is up!

The discussion on this list made me understand that the rough side
should be in contact with the film base side of the negative. But, in my carrier, the way it is beveled forces you to put the top glass in so 
that the smooth side touches the film base.
I guess the only solution is to have the glass re-beveled so that the 
rough side is in contact with the film base side of the negative,
correct?

--shannon
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