Study of Wavelength for Removal of Toner from used Paper by Laser

Abstract

In spite of the spread of personal computer, amount of office papers to be used does not have tendency to decrease. In general, the used papers are withdraw and recycled in order to preserve the environment. If used papers could be reused repeatedly without withdrawing those, it is very convenient. So, we try to remove toner from used papers using some kinds of laser, and concluded that second harmonic YAG laser was one of useful laser.