gold
A very malleable, ductile, yellow trivalent and
univalent metal (Au) that occurs chiefly in the
free state, is unaffected by most chemicals but is
attacked by chlorine and aqua regia, is hardened
or changed in color for use in bookbinding and
other art work by alloying with copper, silver, or
other metals, and which has been used for
centuries to illuminate manuscripts, as well as to
letter and decorate leather and other
bookbindings. See also: GILT EDGES ;GOLD BLOCKING ;GOLD LEAF ;GOLD ROLL ;GOLD TOOLING .
(29 , 102 , 131 , 161 )