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Toner refers to a powder or liquid substance used in laser printers and photocopiers to create images on paper. This substance is composed of fine particles, typically plastic and pigment, which are electromagnetically charged and attracted to a charged drum. The drum, which carries the electrostatic image of the document, then transfers the toner onto the paper. Heat and pressure are subsequently applied to fuse the toner particles permanently onto the paper, forming the visible text and images. Toner technology has evolved significantly over the years, moving from early monochrome powders to more sophisticated color formulations and even liquid toner systems. The composition of toner can vary between manufacturers and printer models, influencing print quality, color accuracy, and cost. Proper handling and storage of toner are important to ensure optimal printer performance and longevity.