Digital BW, The Print

----- Original Message -----
From: "sceptre12345" <am1000@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Wednesday, March 05, 2003 2:09 AM
Subject: [Digital BW] Mounting Oil was Re: Epson3200 - Test
results/Kami


> > For large negs consider using a cover sheet so that you have
a
> sandwich of
> > glass/oil/neg/oil/cover film. The cover film is taped to the
glass
> and you
> > can then use film wipes on the cover film to work air bubbles
out
> to the
> > edge of the negative.
> >
> > Martin Wesley
>
> Would some cover material like a clear acetate be sufficent as
a
> cover film ? How is the negative cleaned after scanning ? Any
danger
> to the emulsion of the negative ?
> TIA
> Andre

Use transparant polyester for that. That is the same plastic the
film is made of. The prepress supply dealers have that too in
sheets or on rolls.

One warning if you use fluids on a flatbed: the surrounding
plastic housing is often made of ABS, it will degrade when it
gets in contact with the fluid. Few plastics withstand the
agression of aromatic fluids: polyester, polypropylene,
polyethylene, nylon, polyurethane, silicone and several more
exotic grades will not be affected or less affected. You have to
work very careful and not spill any fluid on the housing or put a
polyurethane (or silicone that can be removed ?) varnish on the
plastic directly surrounding the glassplate. Maybe a piece of
cling foil with a window cut out will protect it as well (if it
isn't a PVC product).

Professional wetmounting is a process. Antistatic air, adhesive
rolls to take dirt of film and glass, extra cover sheet, mounting
fluid, pressure roll.
There are ways to simplify that.

The housing of most flatbeds isn't strong enough to squeeze the
fluid from the sandwich with a roll, better use a polyethylene
squeegee and another sheet of polyester on top to avoid
scratching of the first polyester sheet. A tod at the end to
absorb excessive fluid. Find a good methode that doesn't need
tape to keep the polyester sheet in position. Tape always gives a
mess in the long run. For that reason I've made some small clamps
on my special Nikon 8000 wetmounting carrier.

If you have a register punch and a register strip you can put the
strip with two sided tape on the housing outside the glass or on
a non scanning part of the glass. For the 3200: there is a small
strip along the left side that isn't scanned. Punch the foil and
put it on the scanner. If you use the same spots the glassless
carrier uses then it is easy, put the carrier on top of that and
mark the window on the polyester foil. Take it off and you know
where the film has to be placed between polyester and glass.
After mounting you can put the carrier on top for scanning. If
you need other film windows then the punch and black paper masks
will make the process as easy. That is how I used to wet mount
film on the Agfa Horizon Plus. If you are handy enough then a
good! adjustable! office punch and a selfmade strip will do.
Don't use more than two holes on sheet sizes like this.

Ernst