| 摘要 |
PURPOSE: To obtain an ink composition containing charged particles comprising a dispersant and a coloring agent as a main component, controlled in the electric resistance of the obtained composition or in the specific charge amount of the charged particles to specific values, respectively, and excellent in image concentration, contrast, resolution and fixation to substrates, and useful for electronic photography, etc. CONSTITUTION: This ink composition contains charged particles containing a dispersant such as a silicone oil, a fatty acid ester, a fluoro oil or an aliphatic hydrocarbon alcohol and a coloring agent (especially having a resin or oil layer on its surface) (e.g. a polymer toner comprising a system containing the coloring agent, a polymerizable monomer and a non-aqueous solvent as main components and having an average particle diameter of 0.01-10μm and a melt viscosity of 0.1-10000pa.sec) as a main component, and satisfies that the specific charged amount of the charged particles (Q/M) is 10-1000μc/g or that the electric resistance of the obtained composition is 10<10> Ω.cm or larger. |
