So after drypoint I tried a true etching process. Here is the plate being covered with ground, which is essentially a coating that you scratch through to expose metal. The exposed bits get etched in an acid bath, the parts covered with ground don't. The un-etched parts of the plate remain flat- so the ink rubs right off them, the etched, or indented, parts of the plate accept ink for printing. Next is the plate (hand on fire) with the initial scratches on it, before the first acid bath.