[pure-silver] Re: newton ring problem figured out
----- Original Message ----- From: "Ken Sinclair" <photo1@xxxxxxxxxxxxxxx> 
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Sunday, July 22, 2007 12:49 PM
Subject: [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
I think sometimes there must be anti-ring glass on the emulsion side. Some films, especially some color films, have an emulsion which is nearly as smooth as the support and can cause the same sort of interference rings. Perhaps that's what happened here if it turns out that the glass will fit on the bottom facing the right way. This is all speculation of course. 

---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 
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