Page 134 - The Wellington photographic handbook

it will be as well to mark the top of the lantern plate, after the
first printing, before it is taken away from the cloud negative,
with a small piece of black gummed paper. It will also be well to
gently move the frame during both exposures so as to soften the
sky line, and prevent a hard junction showing.
When two plates are used, one for the clouds and one for the
foreground, the procedure is exactly the same, except that after
printing the clouds or the landscape, as the case may be, instead
of returning the same plate to the printing frame another is used.
For this method, however, it will be necessary to mask the cloud
negative with the P.O. P. mask, emulsion side down.
The principal advantage of this cover glass method is that
either the landscape or the sky may be reduced in the manner
described on page 108 if found to be too dense and the sky, if
accidentally printed so as to overlap the landscape, may be locally
reduced with the same reducer applied with a camel's hair brush.
Whichever method is used care should be taken that the sky
in the finished slide is lighted from the same direction as the land-
scape, or an effect such as was never seen on sea or land will be
the result. In this connection it is important to note that if the
two-plate method be adopted the sky will be reversed from left
to right, so that a negative of a sky lit in the opposite direction
to that of the landscape with which it is to be combined must
be chosen.

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