This a collection of Ippertype samples, a photo mechanical process. The patent was issued to John W. Ippers assignor to Albert Henry, December 30, 1904, patent number 785,735.

The image Ipper used to demonstrate his process, the Ippertype, was based on an image called Cardinal d'Amboise from 1826 by Nicephore Niepce. 

"Ippertype printing --The object of my invention is to make natural or artificial subjects with graduated deposits of printing-ink in relief-printing, intaglio-printing or planographic printing and by a process which includes photographic means and mechanical means without hand drawing or engraving and without any half tone screen" https://books.google.com/books...

Keywords: photomechanical, photo mechanical printing