The Advanced Color Toner for the Fine Image Quality

Abstract

The full color printer has been rapidly spread in the office and the demand on the full color printer has been also increasing. Especially high-speed printing, oil-less fusing and fine image quality are strongly requested.Recently, several chemical toners are launched. Because they have the small and narrow particle size distribution, they have the advantage in the fine image quality. However the resin of chemical toner is usually styrene-acrylic which is not suitable for the high-speed printing. Moreover, styrene-acrylic has to be high molecular weight to make toner have a sufficient durability. Thus the chemical toner has also a disadvantage in the glossy image for pictorial printing. On the other hand the polyester usually used in the pulverized color toner has better property for the high-speed printing than styrene-acrylic. And because polyester has the good durability even if it has the low molecular weight to provide the glossy image. Thus the pulverized toner using polyester has several advantages over chemical toner, but it has been difficult to make pulverized toner having small and narrow particle size distribution.In this report the design of the pulverized color toner having small and narrow particle size distribution was investigated. This advanced color toner can provide highspeed printing, oil-less fusing and also fine image quality. Furthermore, this toner has the high reliability because of less free silica.