How Does a Color Laser Printer Work?


Imagine how the world would have been without printers. There would be no newspapers. Books would not be available and acquiring documents would have been so much harder. But how do these devices work? For starters, printers make use of four colored inks only: cyan, magenta, yellow, and black. Different combinations of these inks give the full spectrum of colors. Inside the printer, there are two parts. One of them is called the charging roll and the other is the drum. The charging roller rolls over the drum and gives the surface of the drum a negative charge. Imagine pressing your palm into sand. What do you see? You will find an imprint of your hand in the sand.


In the same way, lasers are fired onto the surface of the drum in a way that leaves an imprint of the image. In those imprints, positive charges develop. Ink is transferred to this drum with imprints using a separate roller, and it covers the imprint. The drum then rolls over the printing paper and transfers the ink to the paper. This paper then passes through a heat roller that bakes the ink or toner and gives the final image.