41
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
May 31, 2026
157083
13623
2
Public Timelines
FAQ

jul 22, 1869 - Hectograph (A.K.A Jellygraph/Gelatin Duplicator) was invented

Description:

A printing process that transfers something prepared with a special ink, to a pan of gelatin.

Added to timeline:

16 Oct 2017
0
0
520

Date:

jul 22, 1869
Now
~ 156 years ago