From: Jeff Kreines (email suppressed)
Date: Tue Apr 13 2004 - 09:26:50 PDT
Typically it's done as a "matte" -- a piece of hi-con film with a clear
area and a black area, that is "bi-packed" with the original film, to
mask off the area you don't want to see. This gives you a very sharp
edge, though dirt can be a problem, especially with negative originals.
If the matte isn't in direct contact with the film, it won't be a sharp
edge (which may be fine for your purposes) unless you have access to an
aerial image printer.
Or you could modify a slide projector with a lens that focuses very
close, and project a matte slide onto the film in the printer gate --
but this will take some work.
On Apr 13, 2004, at 11:01 AM, Diane Bonder wrote:
> I would like to make some masks for optical printing. Am not sure if i
> am using the correct term, but something that would block light from
> 1.2
> the frame or expose only a circular area in the center, etc. Does
> anyone
> know the easiest way to do this? it does not need to be perfect. i have
> done optical printing but have never used a mask. would appreciate any
> information on this, and can be answered off list, so as not to clog
> the
> discussion with technical questions, of which i have many.
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