| 摘要 |
PURPOSE:To prevent the blotting of ink when printing is made on a recording material of which fibers are exposed on the surface whereon printing is to be made, and to prevent the tardiness of drying of a printed substance, by making preparation so that the viscosity obtained when the rate of content of a solid material in a composi tion is specified may satisfy specific conditions. CONSTITUTION:Ink has a coloring material, a volatile solvent whose vapor pressure at 25 deg.C is 1 mm Hg and a solid material whose molecular weight is 300 or above, as indispensable components. It is otherwise a liquid composition having as an addi tional indispensable component a solvent of low viscosity whose vapor pressure at 25 deg.C is below 1 mm Hg and whose viscosity is 10 cP or below, and it is ink for ink jet prepared so that the following formula be satisfied when the viscosity (at 25 deg.C) in the condition of the 10 wt % content of the solid material in the composition is denoted by A cP and the viscosity (at 25 deg.C) in the condition of the 30 wt % content thereof by B cP. B/A >= 3. By using the ink having such a characteristic as stated above, an improvement in the blotting of an ink dot in a recording material, such as cloth or paper, of which fibers are exposed on the surface whereon recording is to be made, and an improvement in the drying property of a printed substance, are attained at the same time. |
