The World’s Smallest Mobile Color Printer This printer with a everlasting ink cartridge which with electrothermal theory that can be applied immediately after charging! What is electrothermal theory? Following the electric power switch is turned on, the air ink is ejected to the blast by the instantaneous heating (400 degrees/millisecond) of the thermistor, and the ink is emitted. Air Ink – Uncooked supplies extracted from contaminated elements in the air! We have used for patent protection for this technologies!