INVISIBLE IS BLUE

so this weekend I sat down and hacked my old printer. The idea was to print invisible -doesn´t make any sense!?… but it turned out to be fun in the end.

After some experiments I figured out the exact mixture for the Natriumsulfit to do it´s job on the blue ink and not get clogged up in the cartridge. The results on pictures are pretty good. The fonts are still a little blurry, but I guess it´s just a matter of finding the right paper. Enjoy the video!