| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the subject ink capable of preventing bubbles from forming and stably carrying out printing over a long period and useful for a continuous type recording device by regulating a bubble height measured by using a specific device to a specific value or below. SOLUTION: This ink jet ink is obtained by regulating the bubble height when one h passes from the start of dropping the ink by using a device capable of circulating the ink from an ink reservoir 5 which is a graduated cylinder of 500 mL having 5.5 cm inside diameter through a pipe 6 for discharging the ink at a constant flow rate with a pump 1 and having a discharge outlet 2 having 3 mm inside diameter for discharging the ink of the pipe 6, located above in the vertical direction from the center of the ink reservoir 5 and direction to the ink reservoir 5 under conditions so as to provide 270 ml/min ink discharge rate, 300 ml ink reservoir capacity and 40 nm distance from the discharge outlet 2 to the water surface of the ink reservoir 5 under the discharge outlet 2 to <=450 ml expressed in terms of graduations of the graduated cylinder.</p> |
