In China, Korea, and Japan, rather than using a signature, people have for centuries marked documents using a stamp that for whatever reason is called a “chop” in English (which to my ear sounds faintly racist, but I have no idea the origins of this word). Because of the influence of Japanese woodblock printing on the west, this tradition continues among relief printers around the world.
Now that I'm printing my first edition, I thought I'd like to do this too. Normally, such stamps are carved by hand from precious materials, but since I'm terrible at carving and have access to a 3D printer, I decided to give printing one a try. I made this out of PLA, which is a rigid and hard plastic, and doesn't really take printing ink all that well (traditional stamps use a very, very thick ink which I don’t have ready access to), but with the right technique it seems to turn out just fine. I have to be sure the ink is laid on the stamp surface quite thickly, and the paper I’m stamping into is backed by something soft, but I’m pleased with the results.