A press to automate liphography - a liphograph - is created by Senefelder as a way to make the process even easier. Demand for liphography increases dramatically and by 1970 there were at least 480 total liphographs in just the United States. (1 gen 1817 anni – 1 gen 1971 anni)
Aggiunto al nastro di tempo:
Data:
1 gen 1817 anni
1 gen 1971 anni
~ 154 years