Digital BW, The Print

----- Original Message ----- 
From: "John Vitollo" <jvlist@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Tuesday, January 27, 2004 1:16 AM
Subject: Re: [Digital BW] Polaroid type 55 negs


> I scan it wet mounted on a separate glass plate in focus above
> the glass bed of the 3200. Vuescan two passes + longer
exposure.
>
> Ernst

Ernst,

What thickness glass do you place on top of the 3200's glass bed?

Where's the longer exposure setting in Vuescan?

Thanks!

John V.

John,

First you have to find the right focus for your 3200. Norman
Koren has some information on that. There is a longer message on
the subject somewhere in the archives that I have written. Make a
mask of a plastic sheet and some black paper that resembles the
3200 carriers on the outside but with the appropriate size window
for the film you are using. The thickness of that mask should be
near the focus height. There's a problem there as some 3200's
have their best focus on or near the glassbed. I use a separate
normal float glass sheet of 2 mm thick and a size smaller than
the glassbed so it can be rotated. Liquid mount the film with an
extra sheet of transparent polyester on the glass that itself is
lying on a thick soft piece of paper to even out the pressure
applied. When mounted remove the dust on both sides and put the
film + glass sandwich on the mask that's lying on the scanner
bed. The glass should be turned over with the film "hanging" on
the underside. That way the heat of the lamp isn't interfering
and there's only the scanner glass + polyester foil between the
film and the scanhead.

Long exposure is under the input tab. It will result in two
passes, one normal and one I believe taking 6x longer. From the
last only the extra information is used to get better information
ftom the dark negative parts. With the 2 passes I add this means
that process is done twice. I could only do this with the
negative wetmounted and turned over so underneath the glass as
the lamp heat expands the film or displaces it otherwise.

Ernst