INJECTING LIQUID OF PHYSICAL DISTRIBUTION FOR INK JET HEAD, INK JET HEAD AND PHYSICAL DISTRIBUTION METHOD OF INK JET HEAD

摘要

PROBLEM TO BE SOLVED: To provide an injecting liquid for physical distribution of an ink jet head capable of effectively preventing: solidification of ink due to long-term storage; contamination on a heater surface; deterioration in discharge performance and printing quality due to liquid accumulation at a discharge port peripheral edge part and the like, especially the occurrence of "distorted printing".;SOLUTION: A injecting liquid for physical distribution of an ink jet head is injected in a nozzle flow path communicating with an ink discharge port in physical distribution of a thermal ink jet head. In the ink jet head, an opening area of the ink discharge port is 100-350 μm², and a water repellency region is formed on a peripheral edge of the ink discharge port. At least in an aqueous medium having a water-soluble organic compound and water as components, a dye is dissolved, and the dye is contained so that the concentration of the dye is equal to or greater than 0.2 mass% and equal to or less than 1 mass% with respect to the total mass of the injecting liquid for physical distribution, and also the concentration is equal to or less than saturation solubility with respect to the water-soluble organic compound. Surface tension is equal to or greater than 35 mN/m.;COPYRIGHT: (C)2015,JPO&INPIT