| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electrostatic charge image developing toner mother particles and the toner and the developer using these toner mother particles capable of obtaining sharp and sufficient color reproduction performance and color development performance at the time of forming a full color image. SOLUTION: These toner mother particles are characterized by containing a processed pigment obtained by dissolving an organic pigment and a pigment dispersant represented by the formula in sulfuric acid and adding this sulfuring solutions into water to convert the pigment and the dispersant into minute precipitates and repeating filtration and rinse with water. In the formula, P is an organic dye residue or a heterocyclic group; X is a simple bond or a divalent bonding group composed of 1-50 C, N, O, and H atoms; Y is a -N(R<4> )-R<3> or -O-R<3> - group; R<3> is 1-10C alkylene or phenylene group; R<4> is an H atom or a 1-18C alkyl group or the like; and Z is a hydroxyl or 1-4C alkoxy group or the like.</p> |
