| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an image excellent in image quality fixing property without generating a scatter of toner by containing a coloring agent and binder resin obtained by polymerizing a polymeric monomer composition with magnetic power dispersed. SOLUTION: This developer contains a coloring agent and binder resin obtained by polymerizing a polymeric monomer composition with magnetic power dispersed. Magnetic power in used is desirably to have an average diameter of 0.1-1μm, more desirably 0.1-0.6μm, and its added quantity is desirably to be 0.1-20 wt.%, more desirably 0.2-10.0 wt.% to binder resin. It is desirably that binder resin to be used is thermoplastic resin such as polystyrene, polyvinyl toluene or a styrene-butadiene copolymer. As the coloring agent, carbon black, nigrosine dye or the like is used normally in a range of 1-20 pts.wt., desirably 2-7 pts.wt., per 100 pts.wt. of binder resin.</p> |
