Alois Senefelder Invents Lithography
Problems with the printing of [Alois's] play Mathilde von Altenstein caused him to fall into debt, and unable to afford to publish a new play he had written, Senefelder experimented with a novel etching technique using a greasy, acid resistant ink as a resist on a smooth fine-grained stone of Solnhofen limestone. He then discovered that this could be extended to allow printing from the flat surface of the stone alone, the first planographic process in printing.
He joined with the André family of music publishers and gradually brought his technique into a workable form, perfecting both the chemical processes and the special form of printing press required for using the stones. He called it "stone printing" or "chemical printing", but the French name "lithography" became more widely adopted.
The son of an actor at the Theatre Royal in Prague, Senefelder was unable to continue his studies at the University of Ingolstadt after his father’s death and thus tried to support himself as a performer and author, but without success. He learned printing in a printing office, purchased a small press, and sought to do his own printing.
Desiring to publish plays that he had written but unable to afford the expensive engraving of printing plates, Senefelder tried to engrave them himself. His work on copper plates was not proving very successful when an accident led to his discovery of the possibilities of stone (1796). Senefelder records that one day he jotted down a laundry list with grease pencil on a piece of Bavarian limestone. It occurred to him that if he etched away the rest of the surface, the markings would be left in relief. Two years of experimentation eventually led to the discovery of flat-surface printing (modern lithography). In 1818 he documented his discovery in Vollständiges Lehrbuch der Steindruckerey
History of Printing