CC0 · no rights reserved
Patent model for crystallotypes
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
This patent model demonstrates an invention for crystallotypes, textured printed surfaces made from crystalline surfaces, which were used for security printing; the invention was granted patent number 209521. This invention produced crystallotype plates by means of electrotyping. The model consists of an electrotyped block.
National Museum of American History’s own descriptionCredit linePatent model for crystallotypes. ca 1878. Schedler, Joseph. National Museum of American History. CC0.
