differences in
the
process
chemistry.
All
of
these variables
must
be
accounted for.
2.
Equipment.
a. Ways of Making a Duplicate. Duplicates of a color original can be
made in several ways; contact printing, enlargement, or with one of the
various slide duplicators that are available. For a 35mm slide duplicate,
which are the ones most often required, the best method is with a slide
duplicator. One such unit is the Illumitran slide copier with a 35mm camera
mounted onto it. This is the type of equipment you will most likely use.
b. Making Duplicates with a Camera.
An original can also be copied
onto either sheet film or roll film with a sheet film or roll film camera.
(1) Any tungsten type color film may be used as the duplicating
medium with this procedure. A correction filter is needed over the lens of
the camera if a photoflood is used for illumination of the original, as a
photoflood burns at a 3400 K temperature, and the tungsten film is balanced
for 3200 K. Figure 6-1 shows a setup that can be used.
Figure 6-1.
Duplicating a color original with a camera
(2) The following is an outline of the procedure to be followed:
(a) Place a photoflood in a viewer with a good ground glass front.
(b) Mask the front of
the
viewer
down
to
the
size
of
the
transparency to be duplicated.
(c) Set up the viewer so that its front surface is vertical.
(d) Place the camera on a tripod so that the focal plane is the
same height of the viewer, and parallel to it.
6-3
SS0514
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