Patent ID: 6342105
Filing Date: 2002-01-29
Classification: C11D

Abstract:
A method for washing an ink jet head, comprising:a step of washing an ink jet head using an ink jet washing solution comprised of 80% by weight or more of water and 1.0% by weight or less of a substance with a viscosity of 10 mPas or more at 25Â° C. and/or of a substance which is a solid at 25Â° C., and wherein the washing solution has a viscosity between 0.6 and 3.0 mPas at 25Â° C. and an electroconductivity of 3Ã—10âˆ’5 S/m to 2Ã—10âˆ’4 S/m at 25Â° C., wherein microparticles with a size of 0.2 &mgr;m or more, if any, are present in the washing solution in a number not more than 100/ml; and a step of removing the solution inside the ink jet head after the washing.