[filmscanners] RE: Avoiding Newton rings

["Tim Atherton" <tim@KairosPhoto.com>]

you could probably use the drum mounting fluid successfully

> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Arthur Entlich
> Sent: Sunday, September 29, 2002 5:36 PM
> To: tim@KairosPhoto.com
> Subject: [filmscanners] Re: Avoiding Newton rings
>
>
> As Laurie suggested, there are trade-offs.  I know it is/was used in the
> printing trade, but they use large films, so the magnification may be
> very low, or even 1:1, where it probably wouldn't show up.  In the case
> of a small frame being enlarged considerably, it may indeed degrade the
> result.
>
> Perhaps someone here has tried it and can report.
>
> Art
>
> Brian wrote:
>
> >>One way that this has been dealt with is by using a glass which has a
> >>very fine etched surface which creates very small "contact points"
> >>between the two surfaces.  Another method is to use a very fine powder
> >>(talc is sometimes used) to again create this "airpace" with minimal
> >>contact points.
> >>
> >
> > I have read about the fine powder technique before. But wouldn't this
> > degrade the scanned image (kind of act like dust particles)?
> >
> > Brian P.
> > --------------------------------------------------------------
> > Remove 'nspm' from email address and
> > respond to bdplikaytis@bellsouth.net
> >
>
>
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