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     áòèé÷ :: Filmscanners
Filmscanners mailing list archive (filmscanners@halftone.co.uk)

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[filmscanners] RE: Avoiding Newton rings



One would be to replace the glass with anti-newtonian rings glass if it is
not already that.  Another would be to use an anti-newtonian ring powder on
the glass between the negative and the glass.  I suppose you could use the
two in cnjunction with each other as well as separately.

The powder has been around a while and in use in photo labs for sometime -
especially the older ones or those that use glass negative carriers.  I
assume it is still available from a photographic supply house or someplace
like Edmund Scientific or another scientific supply house.  It is a very
fine powder and should not effect the scan significantly as long as you use
it sparingly.

-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Anthony Atkielski
Sent: Thursday, September 26, 2002 7:52 PM
To: laurie@advancenet.net
Subject: [filmscanners] Avoiding Newton rings


I use the glass 120 film holder on my LS-8000ED because I need to be able to
hold the film flat, however, I have a lot of trouble with Newton rings.  The
weird thing, though, is that some images have multiple instances of the
rings, and others have none.  This implies that the rings are not inevitable
when scanning, only common ... so there must be a way to avoid them.  What
causes the rings on some images but not on others, and what can I do to
avoid them when preparing and loading the film?



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