A toner cartridge is designed to hold physical print medium materials for modern laser printers. Unlike traditional ink cartridges, which contain liquid ink, toner cartridges house toner powder. This powder is utilized in an electronically charged and heated printing process to create text and graphics on a page.

Toner itself is a powder mixture specifically formulated for use in laser printers and photocopiers. It is responsible for forming the printed text and images on paper, typically contained within a toner cartridge.