Pretty straightforward. I know playing cards arose with the printing press, but would it be impossible to have some before the printing press is invented? I’m mostly looking at divination cards, granted, so the need to avoid cards being marked isn’t as strong.
But I’ve seen early medieval type settings in movies or shows where people have cards that look like they’re made of tree bark or hardened leather or something.
I’m not sure how parchment would feel like, if it is fragile or would withstand shuffling. Same with velum and even papyrus (possibly more so). Paper might not have been invented in this part of my world at the time, and so for something thin but resistant I’d mostly picture leather? Possibly with the symbols being burned into it.
Would that be possible or is it too unrealistic?