[pure-silver] Re: Newton... Re: donut solution; enlarger lens problem
- From: Peter De Smidt <pdesmidt@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sat, 12 May 2007 00:12:55 -0700
Richard Knoppow wrote:
I don't know if anyone has made anti-Newton-ring glass using an
anti reflection coating similar to that used on camera lenses but I
think it would work. There is such glass made for mounting artwork to
reduce the reflection of ambient lights so it should not be too
expensive, at least for a trial. The index of refraction of both
gelatin and support are greater than air so the coating may not be
effective for them but if it works it would be better than a rough
surface.
I have heard of people doing this successfully. Note, though, that
Howard Bond is a very careful worker, and he can't see any degradation
using AN glass under the negative. He is, however, enlarging 4x5 and
8x10 negatives. I was surprised when I learned what he does, but I've
seen some of his prints, and they're spectacular. Clearly he knows what
he's doing.
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