‘I have several times had to mould, in America, the whole of a monolithic
monument—one as much as 25 feet in height—covered with carving and
hieroglyphic inscription, and have been perfectly successful in
reproducing it in plaster in England. Each face would be marked out into
three or more sections, and each section would be moulded separately,
great care being taken that each mould should considerably overlap the
margin of the other, so that when each section is cast in plaster the
edges of the cast can be cut away until the joint is perfect. And each
section should also overlap at the top and sides in No. 1, and at the
sides in No. 2, &c., for the same reason; and it is necessary to pay
careful attention to the beating in of the paper near the sides and
edges, as it is there that the layers are most likely to come apart when
dry. These edges can be trimmed down afterwards, if found too bulky in
packing.
‘The first sheets of paper should always be put on singly, and well
beaten in. If the carving presents many sharp angles, the paper will
again and again be broken away over them, and small scraps of paper may
be used for covering them up, until the whole section is covered at least
three papers deep in the thinnest place. The coat of paste should then
be given. If the paste is laid on when the mould is too thin, it will
penetrate to the stone, and prevent the mould coming off when dry. The
paste may be put on warm, but if too hot it draws the paper from the
stone (if it is a stone sculpture); air gets underneath the paper, and it
is very difficult to get rid of it again. Avoid, in putting on the first
papers, doubled edges or creases, and beat in well, so that the paper may
work into the grain of the stone or wood. It is easy to spoil a mould by
scamping the work in it, but not easy to spoil it by overbeating. After
giving a coat of paste with a brush, it is advisable to work in the paste
with the fingers, so as to be sure, from the smooth feeling, that it
penetrates the paper over the whole surface.
‘After the first coat of paste has been applied, a good deal of time
may be saved by employing an assistant to beat out the paper for the
further thickening of the mould, for when thus beaten out, two or three
thicknesses of paper can be laid on at the same time. Take about six
sheets together from the water, fold them, and then double them twice,
and slightly tear the wet doubled edges, so that when the sheets are laid
open again there are a number of small slits in the paper; then lay them
out together on any flat surface, and beat them out with a brush for a
few minutes. It is easy to separate them again into the required number
of sheets in thickness.
Public-domain text, read in full here on John Shaqi.
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