Alexander Ghaffari
Member
Not exactly "optical" as that would imply enlarging. Rather, contact printed postcards were universally popular. Many manufacturers made roll film and plate cameras with the postcard size image.
Well, of course, I didn't know what word to use in order to differentiate "optical" light-sensitive paper versus the various "non-optical" printing methods. I re-read The Printed Picture a few days back...there were quite a lot of printing methods back then, even for just making postcards. The only proper Victorian-aged size that I can contact print at the moment is the carte de visite.
