Special toner formula forces a bright red stain to appear if chemical alteration is attempted. Any solvent that will remove toner will release the dye. Unique formulation can be used to protect checks, transcripts, medical records, legal documents, and much more. This brand costs more for a reason - Do not take chances on your MICR printing! TROY is the largest desktop MICR toner manufacturer in the USA and precision-manufacturers the highest quality MICR toner available for a wide variety of laser printers. TROY uniquely formulates the toner and designs a MICR font for each specific printer model, in order to meet the exacting specifications required to pass bank requirements. Through their technical expertise, and constant testing and, Special toner formula forces a bright red stain to appear if chemical alteration is attempted. Any solvent that will remove toner will release the dye.