tusche

noun

tu·​sche ˈtüsh  ˈtü-shə 

: a black liquid used in lithography for drawing and painting and in etching and the silk-screen process as a resist

Word History

Etymology

German, from tuschen to lay on color, from French toucher, literally, to touch, from Old French tuchier — more at touch entry 1

First Known Use

1885, in the meaning defined above