a. Ways of Making a Duplicate. Duplicates of a color original can be
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.
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
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.