Archived posting to the Leica Users Group, 2000/03/01

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Subject: Re: [Leica] Re: Solutions for avoiding newton rings
From: Mark Rabiner <mark@rabiner.cncoffice.com>
Date: Wed, 01 Mar 2000 16:33:03 -0800

Jim Brick wrote:
> 
> Newton rings are caused by imperfect contact by part of the film with
> glass. Film with more curl are more prone to newton rings. Current humidity
> also is a factor as to the severity of the problem.
> 
> One solution is, of course, to eliminate all contact between film and
> glass. This is why glassless neg carriers are so popular.
> 
> Many years ago (1950's) Kodak recommended rubbing the glass (that which has
> contact with the film) with fine (00) pumice powder using cotton. This
> basically makes the surface layer of the glass, less "glazed" so that the
> type of film/glass contact, producing newton rings, does not take place.
> The use of 00 pumice powder makes no humanly observable difference. But it
> makes a difference in how the film base and glass get along.
> 
> Jim
> 
With the advent of mass scanning I find at Pro Photo in Portland oregon they are
selling Anti Newton Spray.
Perhaps you use it after your shower in the morning?
Or as a general room mist!!!
There will be no one with the last name of Newton in sight I imagine!
Mark :-) Rabiner