Such a cementation or method of mounting is that which has
been generally adopted, and the consequence has been that every now and
then complaints have justly been made of the untruthfulness--owing to
this particular distortion--of photographs; productions whose chief merit
has often been asserted to consist in their absolute truthfulness. This
distortion is very manifest when, in a set of portraits, some of the
prints happen to have been made in one direction of the paper, and others
with the long grain the other way. I have known a case where a proof
happened to increase the face in width, and all the other prints
increased it in length. Of course, neither was correct, but the proof had
been accepted and liked, and the remainder of the set had to be reprinted
with the grain of the paper running in the same direction as that in the
first one which had been supplied.
Another evil arising from mounting prints while expanded with moisture
is, that in drying the contraction of the paper pulls round the card into
a curved form and although by rolling this curvature may be temporarily
got rid of, the fiber of the paper is in a strained condition, and the
bent state of the mount is, sooner or later, renewed thereby.
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