| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain toner for full color electrophotography excellent in color reproducibility by setting the dispersion diameter of releasing agent within a specified value and haze degree to be equal to or under a specified value. SOLUTION: This toner is constituted of binding resin, colorant, the releasing agent and electrification control agent. The dispersion diameter of the releasing agent is >=0.1μm and <=2μm, and the haze degree is <=20% when the main concentration is 1.5 hour. The dispersion diameter of the releasing agent largely influences the coloring degree and the transparency of the obtained toner. When the dispersion diameter thereof is smaller than 0.1μm, the deterioration of the releasing property of the toner is found, so that trouble such as the winding of the sheet to a fixing roller and a pawl mark is caused, fluidity and shelf life get worse and developer having uniform electrifying amount distribution is not obtained. On the contrary, when it is larger than 2μm, the desired fluidity and the desired electrifying amount are not obtained, and deterioration of image quality is caused. The dispersion diameter of the colorant in the binding resin is set to <=1μm, desirably, 0.2 to 0.7μm, so that the color reproducibility is made more excellent.</p> |
