| 摘要 |
<p>PURPOSE:To provide an electrostatic charge image developer excellent in high resolution, high reproducibility of high light and high reproducibility of fine lines. CONSTITUTION:This developer for electrostatic charge image developing contains a toner and a carrier. The carrier has 5-100mum particle size, <=3.0g/cm<3> bulk density, 30-150emu/cm<3> magnetization (sigma10000) for 1000Oe, >=25emu/cm<3> magnetization (residual magnetization sigmar) for 0Oe, and coercive force is <300Oe The toner is directly obtd. by water-base suspension polymn. The mol.wt. distribution of the resin component which constitutes the toner measured by GPC has at least one peak in the range from 5000 to 50000. The resin component contains at least one polar component.</p> |
