mastic
An aromatic, resinous exudation obtained usually
in the form of yellowish to greenish lustrous,
transparent. brittle tears from incisions in the
bark of the mastic tree, Pistacie lentiscus and
used, along with sandarach and rectified ethyl
alcohol (spirit of wine), to make a varnish used
to impart a high gloss to leather bookbindings.
(97 )