| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a recording liquid which at least comprises a dispersant, a water-soluble liq. medium, a humectant, a pigment, and water and is excellent in resistance to clogging and delivery recovery in an emergency and an assessment method for selecting the recording liquid. SOLUTION: The dispersant of this recording liquid is a polyoxyethylene alkyl (or alkylphenyl) ether sulfuric ester salt deriv., and a humectant is selected from among specified compds. The recording liquid forms a meniscus at a nozzle hole surface and, when exposed to the air, causes the phase separation due to the evaporation of water from the liquid. The surface forming a meniscus after the phase separation is a clear phase with a high humectant concn. The method for assessing a recording liqid comprises drying the liquid and assessing the change in ink particle size and redispersibility before and after the drying. Thus, a recording liquid excellent in resistance to clogging and the delivery recovery in an emergency is selected.</p> |
