wait, i just went to the website and there's this video of them screen printing ceramic ink on some water slide media. i bet that i could use the stuff for screen printing. and if not, i could at least coat it myself with a receptive coating. coating solvent over gelatin is not an option but???? maybe the screen print version?
so far the two industry standard words turn out to be decalcomania paper, and decal paper, and transparent decal paper
...update. after some more reading. it seems that "waterslide" or water transfer or decal paper is basically paper with a thick gelatin coating on it. the gelatin breaks loose from it's backer paper and then can stick to it's next surface. and because it is gelatin, it breathes and dehydrates. cool. but not for solvent ink. looks like a solvent ink compatible version would have to be coated in some way.