Portrait of Young Man, c.1860, Ambro Type, 50×40 mm, Unknown Photographer, PhotoMuse Collection, 2017, Gift of Dr. Unni Krishnan Pulikkal, Source – Herbert Ascherman Collection.
The ambrotype was invented by Frederick Scott Archer. It was introduced in the 1850s and is also known as a collodion positive in the UK. It is a positive photograph on glass made by a variant of the wet plate collodion process. Like a print on paper, it is viewed by reflected light. Each ambrotype…