| 摘要 |
PROBLEM TO BE SOLVED: To perform recording with high fineness and high gradation at a high speed. SOLUTION: When an electric field in a cohesion region 220 is applied to a tip of a discharge electrode, spherical pigment aggregates fly from the tip of the discharge electrode. In this case, a period of ink discharge is relatively long, but fine pixels can be formed on a recording medium because no excessive charged-pigment particles fly from the tip of the discharge electrode. When an electric field in a condensation region 222 is applied to the tip of the discharge electrode, hemispherical or thick-walled shell-like pigment aggregates fly from the tip of the discharge electrode. In this case, an ink solvent containing charged-pigment particles also flies together with the hemispherical or the thick-walled shell-like pigment aggregates and, accordingly, pixels having density higher that of the pixels formed in the case where the electric field in the cohesion region 220 is applied, can be recorded at a high speed. Such an electric field in the condensation region 222 is suitable for solid recording. |
