An overall feeling or emotion. Also see expression . In etching , a bath of either an acid or a diluted acid in which a plate or a piece of glass to be etched is placed. Also see aqua fortis and nitric acid . In Japanese art , forming patterns in raised gesso .
Mortices are usually rectangular or trapezoidal in shape .
Also, to make such a cavity or to join pieces of material with them. In casting , a mold outside of another mold. A mother mold is generally composed of two pieces which surround the sections of a piece mold . Sometimes called main case. Also see foundry and lost-wax casting .