Recently I have come across a number of examples of cartes de visite dating from the late 19th century. I noticed that the photographic paper mounted on top of the cardboard seems rather thin. The thinnest enlarging paper I have used has 190 g/m^2 and seems much heavier.
What kind of paper (base) was used for cartes de visites? Is something similar sold today?
That’s actually an interesting question. The albumen paper of that time was very thin, I imagine that it was somewhat difficult to work with, especially when wet.
I reckon that each photographer could use whatever paper they had lying around. The albumen process required coating the paper, so any paper that was handy would work.