Inventor of Nature Printing
Alois Auer was a printer, inventor, and botanical illustrator, most active during the 1840s and 1850s. He produced a number of works in German and other languages, including the first regarding the nature printing process.
Google Arts and Culture
Microscopic view of an insect, 1853 
Seven large plates of plant specimens, 1856
Photogravure
This term is a photomechanical process of printmaking, in which a photographic image is transferred to a metal plate that is then printed in intaglio.
British Museum
References: https://artsandculture.google.com/entity/alois-auer/m02z4n38?hl=en https://www.britishmuseum.org/collection/term/AUTH227096