Patent ID: 8157349

Claim:
A method for performing a cleaning of a surface of an inkjet head comprising: supplying a head treatment solution to the surface and then performing a wiping operation, wherein the head treatment solution is a liquid solution including water, a glycerin and a surface acting agent, wherein the surface of the inkjet head is provided with ejection openings through which an ink containing a color material is ejected, wherein conditions of Fγs<Iγs and concurrently Fγs<Rγs are used, where a surface tension of the surface of the inkjet head is Fγs, a surface tension of the ink is Iγs, and a surface tension of the head treatment solution is Rγs, and the head treatment solution is different from the ink, wherein Fγs<Iγs<Rγs, and wherein the surface of the inkjet head is water-repellant.