Digital BW, The Print

Scott,

This is from an article by George DeWolff in Camera Arts magazine.

Basically you tape a piece of optical grade Mylar to the glass plate 
of the scanner. Kami also makes a tape just for this purpose.

You then place some mounting fluid (George used mineral oil) on the 
glass and lay your negative on top of the fluid. Put more oil on top 
and lower the taped Mylar over the negative.

Using a soft cloth or scanner wipes, gently smooth down the Mylar and 
push out any air bubbles between the negative and glass and negative 
and Mylar.

You now have a glass-fluid-negative-fluid-Mylar sandwich. There are 
three benefits. One, the negative is perfectly flat. Two, any surface 
imperfections on the film and dust are rendered invisible. Three, you 
reduce the number of surface-air interfaces between the image and the 
lens which degrade the optical performance.

George's article with photographs is really amazing.

If you search the archives here and on the Piezo list for wet 
mounting you should turn up a lot of info.

Martin



--- In DigitalBlackandWhiteThePrint@y..., "Scott Hendershot" 
<scott@p...> wrote:
> Martin,
> 
> Can you elaborate on what the optical mylar is used for? Does it 
prevent
> newton rings?
> 
> Scott
> 
> ----- Original Message -----
> From: "Martin Wesley" <mwesley250@e...>
> To: <DigitalBlackandWhiteThePrint@y...>
> Sent: Tuesday, November 20, 2001 3:12 PM
> Subject: [Digital BW] Re: UltraBase
> 
> 
> > Peter,
> >
> > Thanks for the offer but I have an unopened pack of optical Mylar
> > ready to go when I have the time and inclination. Let me know if 
you
> > want some UltraBase.
> >
> > Martin
> >
> > --- In DigitalBlackandWhiteThePrint@y..., Peter Lindman
> > <plindman@q...> wrote:
> > >
> > >
> > > Martin,
> > >
> > > Also I'd be glad to send you some mylar sheets if you'd like to 
give
> > > that a go. Lots of prepress shops wrap the film with mylar in a
> > kind of
> > > drum-film-mylar sandwich.
> > >
> > > thanks,
> > > Peter
> >
> >
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