Step 1: Intro
Step 2: Get the Materials
The ink is a dry magnetic ink that's used to print checks and other documents that use magnetic character recognition (check out the wikipedia article at http://en.wikipedia.org/wiki/Magnetic_ink_character_recognition if you want to know more about this awesome technology). You can get a box of it on ebay for about thirty bucks (search for MICR or magnetic ink), and you can also get it at http://www.expresstonercartridges.com/okidata.htm. It's going out of style, so you'll have to poke around a little bit to find it. It's important to remember that you don't want a toner cartridge--just the toner.