Patent ID: 6402285
Filing Date: 2002-06-11
Classification: B41J

Abstract:
A method of pretreating an ink-jet printer before it is used, the ink-jet printer including a printing head provided with a plurality of nozzles for ejecting ink-droplets and movable in a reciprocating manner, an ink storage section and an ink supply conduit connecting the printing head with the ink storage section, the method comprising the steps of:(a) filling entirely an ink flow passage including said ink supply conduit with a colored liquid material having a function for maintaining a hydrophilic nature of said ink flow passage, before the ink-jet printer is forwarded from a factory; and (b) carrying out a printing operation by said printing head by using said colored liquid material and observing a character printed with said colored liquid material to determine a printing function, before the ink-jet printer is assigned to a user.