Perhaps I've been a little bit dim (no pun intended) but I'd never put two and two together before and realised that photography is basic printing with light. Back in the old days you'd take your film into Boots the Chemist and and hour later you could pick up your "prints" yes, prints, the clue's in the name, duh!
In very basic terms you start with a blank piece of paper, all be it a light sensitive, introduce a resist, expose it to the light, place it in the developing solution and hey presto you've got your print.
At an even more basic level are photograms but the resist is not a plate or negative but objects placed onto photographic paper.
I got to play in the dark room experimenting with different exposure times and a variety of sewing related objects, oh, and a fork.