Electrostatics Project

Laser Printer

Laser Printers and how they work

Laser printers work using the xerographic process to produce high quality images onto paper.

Basically, a high precision laser copies images onto a selenium coated drum which has a positive charge.

The laser reflects off of a mirror and onto the drum, which rolls and copies it onto the paper, which then has a positive charge.

Then after the image is on the paper, the paper passes through heated rollers which melts the image onto the paper and the paper comes out still hot.

Awesome printers!

Pictures get their colours the same way that that the picture is made, except they go the the process four times. One for the colours Magenta, Cyan, Black and Yellow. These four colours can generate any colour when mixed.