Patent ID: 6086191
Filing Date: 2000-07-11
Classification: B41J

Abstract:
A method for cleaning an ink holding material, comprising the steps of:providing an ink holding material; andcleaning the ink holding material with a liquid comprising pure water as a main component by immersing the ink holding material in the liquid and subsequently extracting the liquid from the ink holding material by centrifugal force so that when the liquid is extracted therefrom electrical conductivities and surface tensions of the liquid before and after extraction satisfy a relationship as follows:350.gtoreq..gamma.r/.sigma.r-.gamma.s/.sigma.s.gtoreq.0wherein .gamma.r represents the surface tension (mN/m) of the liquid before extraction; .sigma.r represents the electrical conductivity (mS/m) of the liquid before extraction; .gamma.s represents the surface tension (mN/m) of the liquid after extraction; and .sigma.s represents the electrical conductivity (mS/m) of the liquid after extraction.