Reddit mentions of SmartSolve 8.5" x 11" Dissolving Paper

that's really similar to how I make mine, except I use de-foiled backs. I use modern cards just for ease of access, but to be kinda authentic you could use Urza block foils. I foil peel the cards, and then glue on my printed faces. I'm currently printing on 15 lb paper, which is super thin, but not thin enough. I'm about to try dissolving paper so I can basically silk screen the ink straight onto the card. I'm aligning cardstock and printed paper using a 3-d printed card positioner I made, which is basically a frame that fits over the printed paper and allows me to drop the card on with perfect accuracy.