We bought a large lot of mixed equipment at an auction, and one group of items has us puzzled: they're something to do with candy, but they're positive, not negative. We're not sure if you use them to make impressions in some other material or if you pour something over them or what.
Some of them are loose, most are on a plexiglass backing. Some of the molds and the plexiglass have very small holes, presumably to let air out. I can't seem to find search terms that give me results for the right sort of positive mold, I get only stuff about silicon molds or fungus...
I'm not sure what the material is, some of them look like metal covered in plastic, some seem to be a very dense plastic.
As mentioned in a comment, "CANDYCRAFT" is a Minecraft mod, so Googling that doesn't get any useful info. But the comments did lead me to try some different searches. The molds are labelled "Pauline Johnson CANDYCRAFT ####" and I found some local (Vancouver BC) results for a company that seemed to exist here called "Pauline Johnson Candy" or (maybe later?) "Pauline Johnson Confectionery" That makes me think the answer about them being masters for making silicone molds is most likely correct.
Molds on backing: