( n. )
A method adopted in etching, to keep the acid from those parts which are already sufficiently corroded, by applying varnish or other covering matter with a brush, but allowing the acid to act on the other parts.
( n. )
A method adopted in etching, to keep the acid from those parts which are already sufficiently corroded, by applying varnish or other covering matter with a brush, but allowing the acid to act on the other parts.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012