U of S | Mailing List Archive | alt-photo-process-l | RE: Masking contact prints

RE: Masking contact prints

Hi Jon,

You can use four strips of fully exposed (dmax something like log 4 or 5)
imagesetter film. The width of the strips should be something around 1 -
1.5". (As much as you want actually; just pay attention to not apply
sensitizer beyond that limit.) You'll need two long strips for the long
edges and two short strips for the short edges of your prints. It's a good
idea to size them at maximum which is allowed by your contact printing
frame, that way you'll have only four strips accomodating all print sizes
possible with that particular contact printing frame. You'll just have to
tape them to each other in order to form a rectangular of the right size.
Layer order would be: 1. glass, 2. masking frame (emulsion facing down), 3.
negative (emulsion facing you) and 4. paper (coated side facing the down).
Since imagesetter film is extremely thin, you shouldn't experience any
perceptible sharpness loss on the edges. (Very little, if any...) You can
try to paint the edge of the masking frame with black permanent marker in
order to lessen reflections.

Hope this helps,


From: sharperstill@gmail.com [mailto:sharperstill@gmail.com] On Behalf Of
Jon Reid
Sent: Wednesday, July 01, 2009 1:07 PM
To: alt-photo-process-l@usask.ca
Subject: Masking contact prints


Anyway, my question to the group is as follows. I'd like to know peoples
ideas for best way to mask the neg during exposure to prevent black borders.
My  method which is failing was to cut a 5x7 rectangle in a piece of black
card and to stick the negative into this card using ruby-lith to not only
hold it in place but to mask the shoulder/film edge etc and create a clean
rectangle. The thickness of the card is about equal to the film and thr
uby-lith was on the glass-side.

I intend to exhibit these images and wish to present them un-matted, on
11x14 paper. What's happening is that next to the print edges, about 1mm
away, I am getting sporadic short lines of exposure that looks like it's
refracting through the film-edge or something.

As stated I want to exhibit these unmatted and would like to know if anyone
has a better way of masking these negs accurately?