A small tablet of metal having a design in relief
and cast from a wax mold. The principle was
adopted in France during the 15th and 16th
centuries as a center decoration for book covers.
Hand-painted specimens are to be found on books
hound for Jean Grolier, the plaquette being
impressed in gesso, painted, and then fitted into
the upper board. S(e also: CAMEO BINDINGS . (347 )