Drying is out of the question. Even if I had to leave it to dry for 1 hour, which is not the case, I am only interested in whether the paint is completely dry, whether it smears when my hands are wet or how long it takes for the paint to smudge.

servus, if the settings on the printer correspond to the paper, nothing smears. in my experience, the colour smears if the wrong paper/sheet etc. is inserted or the wrong printer profile is selected. well, I would give the freshly printed photo/label a few seconds before vigorously grabbing directly onto the image surface.
The printer prints perfectly precise and quite true to colour -> for the price and its large selection of formats -> Hammer Gruss