Toner cartridges are essential components used in laser printers and copiers. They contain a fine powder called toner, which is made from plastic particles, carbon, and coloring agents. When the printer receives a command to print, the toner is transferred onto paper using heat and pressure, creating text and images. These cartridges come in various types, including black toner cartridges and color toner cartridges, depending on the printing needs. They are designed for specific printer models, ensuring compatibility and optimal performance. Proper disposal and recycling of used toner cartridges are important for environmental sustainability.