Laser printer ejects is a permanent mark that can not be erased. It is formed by the instantaneous vaporization of laser directly on the surface of the object. It can be distinguished by naked eyes without any auxiliary tools, which is convenient for consumers to identify. And no consumables, more convenient maintenance. Laser printer breaks through the standardization and singleness of traditional ink jet printing technology, creates a new spray method, highlights the product characteristics and brand differences,improves the competitiveness of products in the increasingly fierce market, and provides a powerful tool for shortening the product upgrading cycle and flexible production.