Figure 21. Preparation of a trannparency by the Bruing method.
parency will be covered by about half the width of the tape. U n r o l l
a short length of tape, and attach the free end to one corner of the
transparency. Press down with one band on the tape that has been
attached, and with the other hand unroll the tape to the adjacent
corner of the transparency. Smooth the tape down with the hand
opposite the roll of tape, and then cut the tape with a sharp tool, such
as a razor blade. Turn the mount over, and press the tape down on
the reverse edge. Tape all four sides of the transparency to the mask
in the same way.
c. Temporary Mounts. Construct a temporary mount by taping one
edge of a sheet of clear plastic to one edge of the mask. Then insert
the material to be projected between the plastic and the mask.
d. Overlays. Mount
of overlays (cells)
on a single mask
by taping each cell to the same edge of the mask, by taping the cells
alternately to opposite margins, or by taping the cells to succeeding
margins in rotation. If necessary, affix a numbered sticker to each
cell to indicate proper sequence.
e. Double Cutouts. Insert the transparency between two masks.
Then seal the masks together with tape, glue, or mounting tissue.