Thermal printer in the context of Computer printer

A printer is a peripheral machine which makes a durable representation of graphics or text, usually on paper. While most output is human-readable, bar code printers are an example of an expanded use for printers. Different types of printers include 3D printers, inkjet printers, laser printers, and thermal printers.

The Game Boy Printer, known as the Pocket Printer in Japan, is a thermal printer accessory released by Nintendo. It allows users to print special images from over 100 compatible Game Boy and Game Boy Color games onto thermal paper, which can then be applied as stickers. The accessory was designed primarily for use with the Game Boy Camera, which it released alongside in 1998.

Thermal paper (often supplied in roll form, and sometimes referred to as an audit roll) is a special fine paper that is coated with a material formulated to change color locally when exposed to heat. It is used in thermal printers, particularly in inexpensive devices, such as adding machines, cash registers, credit card terminals and small, lightweight portable printers.

The surface of the paper is coated with a substance which changes color when heated above a certain temperature. The printer essentially consists of a transport mechanism which drags the paper across a thermal dot matrix print head. The (very small) dots of the head heat up very quickly to imprint a dot, then cool equally quickly.