In laser printers some special inks are used.Toner is one of the special type powder for the laser printer.This toners are ectrically charged particles.So the opposite charged particle will attract each other.This partticles are made as a catridge and inserted in a laser printer.You can take some more hundreds of pages with this toner catridge.when the catridge becomes empty you can replace it or refill it with new toner particles. So it allows you to use it again. http://www.cheaprefills.info
