Patent ID: 8080355
Filing Date: 2011-12-20
Classification: G03G

Abstract:
1. A liquid developer comprising an insulation liquid containing a fatty acid monoester, and toner particles comprised of a polyester resin, wherein the toner particles are characterized in that: an average particle size of the toner particles is in the range of 0.7 to 3 μm; an average roundness R of the toner particles represented by the following formula (I) is in the range of 0.85 to 0.98, wherein L when a particle size distribution of the toner particles is measured in the volume basis to obtain a frequency distribution curve of the particle size distribution of the toner particles, an index S which indicates a sharpness of the frequency distribution curve of the particle size distribution of the toner particles represented by the following formula (II) is 1.4 or less, wherein in the case where a cumulative distribution curve of the particle size distribution is plotted using a graph in which the ordinate axis represents a relative amount of the toner particles (%) with respect to the total amount of all the toner particles (100%) and the abscissa axis represents a particle size of a toner particle (μm), each of D(90), D(50) and D(10) respectively represents a particle size of a toner particle at a point of each of 90%, 50% and 10% of the relative amount of the toner particles in the cumulative distribution curve.