Printer ink is a liquid used in inkjet printers to produce text and images on paper. It comes in various colors, typically including black, cyan, magenta, and yellow, which can be combined to create a wide range of hues. The ink is stored in cartridges that are installed in the printer, and it is sprayed onto the paper through tiny nozzles. There are two main types of printer ink: dye-based and pigment-based. Dye-based ink is known for its vibrant colors and is often used for photo printing, while pigment-based ink is more resistant to fading and water, making it suitable for documents that need to last longer.