Ink jet printing method and apparatus for coloring an article of aluminium or aluminium alloys

摘要

A printing method and apparatus for coloring an article of aluminum or aluminums alloys, said article comprising a surface formed by an open pore oxide layer, and an article printed therewith. In order to achieve a high quality printing image that exhibits a high resolution, wherein the effects of color migration and bleeding of the deposited ink compositions are reduced, the method comprises the steps of mounting said article on an inkjet printing apparatus; printing a bottom printing layer on said surface according to predetermined pixel information and at a predetermined ink deposition rate for each pixel; successively printing at least two upper printing layers on said surface, wherein on each upper printing layer the same pixel information is printed as on the bottom printing layer and the ink deposition rate for each pixel is adjusted if required; and heating said article for fixing the resulting printing image on said surface.