| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the yellow toner mother particles capable of attaining sharpness and sufficient color reproducibility and development at the time of forming a full color image by using a full color copying machine of printer or the like, and capable of obtaining sharpness and remarkable transparence, especially, at the time of forming an image can a transparent substrate, such as a sheet for an OHP, and to provide the yellow toner and the yellow developer each using these yellow toner mother particles. SOLUTION: These yellow toner mother particles are obtained by heat kneading an organic pigment aqueous paste (A) with a resin (B) being solid at normal temperature, after that, removing water to form the pigment (C) coated with the resin (B), and heat kneading this resin-coated pigment (C) with a binder resin (D). The organic pigment is represented by the formula in which each of R1 -R8 is, independently, an H or halogen atom and at least 3 of R1 -R4 are halogen atoms.</p> |
