Censorship! Persmuseum IISG

1900-1945: Mass Media and Censorship I
Original set for writing with invisible ink.
Grated alum was used to write between the lines. The recipient rendered the writing visible by running a flatiron over the paper. The comb and shoe-horn were meant as camouflage.
Donated by Joaquina Dorado, widow of the Spanish anarchist Liberto Sarrau Royes (1920-2001)
Call number: IISG
BG K21/798