MICR is an acronym for Magnetic Ink Character Recognition. MICR Cartridges are used for printing checks. Banks read magnetic ink differently than standard ink, which allows them to reliably process checks. Magnetic Ink Recognition Toner; Regular toner mixed with IRON OXIDE particles, recognized by scanning devises. Mainly used for Check printing and bar coding. Built with NEW drums and NEW components that match all ABA standards (American Bankers Association). CB435A MICR Toner - HP LaserJet P1005 P1006 MICR Toner - Print your own checks with our HP compatible CB435A MICR Toner. Most HP laser printers can be used as a laser check printer. All you need is a MICR cartridge, check paper, and check printing software. You will be able to print check stubs, print checks in quickbooks and any other check software. This HP 35A MICR Toner Cartridge is a compatible black toner used in MICR check printing. For use in HP LaserJet P1002, P1003, P1004, P1005, P1006, P1009 printers. Compatible with MICR Cartridges: CB435A, CB435X Page Yield: 1,500 @ 5% coverage.