Answer: electrotypes

AnswerCrossword Clue
electrotypesELECTROTYPE
electrotypesto make an electrotype of
electrotypesthe process of making electrotypes
electrotypesfacsimile, for use in printing, of a block of type, an engraving, or the like, consisting of a thin copper or nickel shell deposited by electrolytic action in a wax, lead, or plastic mold of the original and backed with lead alloy