Page 123 - The Wellington photographic handbook
P. 123
THE WELLINGTON LANTERN PLATE, which is intended
for use in the dark-room, and
THE WELLINGTON S.C.P. LANTERN PLATE, which can
be handled in ordinary subdued artificial light, in the same
way as the WELLINGTON S.C.P.
Both grades are suitable for contact printing or reduction,
but for reduction the WELLINGTON Lantern Plate will be
found the more suitable, although with a powerful illuminant, such
as daylight or the electric arc, the S.C.P. Lantern Plate can be
used with equal success.
A valuable property of both these grades of lantern plates,
and especially of the S.C.P. Lantern Plate, is that it is easy to
vary the colour of the slide by increasing the exposure and modify-
ing the developer in the manner described hereafter.
A PRINTING FRAME FOR CONTACT SLIDES.
It is quite possible to make slides by contact in an ordinary
printing frame. The negative is placed in the frame, the lantern
plate adjusted in the required position, the back replaced, and
the exposure made. There is, however, always a risk of scratching
either the negative or the lantern plate, as the one is slid over the
other to decide which is the best position for the lantern plate to
occupy. To prevent this various patterns of lantern slide printing
frames have been put on the market. It is quite easy to adapt
au ordinary printing frame to this purpose. A frame should be
selected decidedly larger than any of the negatives from which
slides are to be made. A half-plate printing frame is, for example,
a very good size for quarter plate negatives. A piece of clean
glass is first placed in the frame and fastened in position by gluing
over it a piece of black paper larger than the glass, the edges being
attached to the frame. In this paper a hole 3£ inches by 3£ inches
is cut so as to come in the exact centre of the glass. Instead of
the usual hinged back, one piece of flat wood is fitted, its underside
covered with smooth felt or cloth, and a hole cut in its centre also,
a shade larger than 3J inches by 3£. A little door, 3£ inches by 3|,
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