A toner cartridge is a replaceable component of a laser printer that contains toner powder, a fine mixture of plastic particles, carbon, and coloring agents. This powder is used to print text and images on paper. When the printer operates, the toner is transferred from the cartridge to a drum, which then imprints the image onto the paper using heat and pressure. Toner cartridges are essential for high-quality, fast, and efficient printing, especially in offices or businesses that require frequent printing. They come in different colors, such as black, cyan, magenta, and yellow, for color printing. Toner cartridges are known for their durability, longer print yield compared to ink cartridges, and ability to produce sharp, clear prints.