| 摘要 |
<p>PURPOSE:To provide the title ink which has a high flight accuracy, can be colored and has excellent recording rate, durability and stability, by adjusting the value of a dimensionless quantity defined by physical properties such as a density, a viscosity, a surface tension, etc. to a predetermined value. CONSTITUTION:Each of physical values is adjusted so that a dimensionless quantity, l, defined by the equation (wherein rho is ink density in kg/m<3>; mu is viscosity in N.sec/m<2>; alpha is surface tension (N>m); a0 is a gap distance in m formed between the lead electrode and the opposing electrode of a thermoelectrostatic ink jet recording device and an electric field is applied therebetween; and rho' is air density in kg/m<3>) is a value of 100 or smaller at 20 deg.C and a value at 70-200 deg.C of at least three times as large as that at 20 deg.C to obtain the title ink.</p> |
