This youtube video is a good demonstration of the packing tape image transfer technique:
Use laser prints. Cut out print. Carefully lay face down onto sticky side of packing tape. Turn over and burnish with a popsicle stick or bone folder so that all the ink adheres to the tape. Rinse under water to wet the paper backing. Let sit for a minute. Rub off the paper backing gently, wet again when needed. Keep rubbing until the paper fibers are gone. Let dry. There may be a few bits of fiber but it shouldn’t be a problem. If after you let it dry, there’s too much fiber, wet and rub again.
Here are a couple of my image transfer magnets that I’ve used as geoswag: