Photocopier powder, also known as TONER, is a dry, fine powder used in laser printers and photocopiers to form the printed text and images on the paper. It is usually made from a mixture of carbon black, iron oxide, and plastic particles. The TONER is applied to the paper by an electrostatic charge, which causes it to stick to the paper. The TONER is then heated, which causes it to melt and form a permanent image on the paper.