顔料、静電荷像現像用トナー、静電荷像現像用現像剤、トナーカートリッジ、プロセスカートリッジ、画像形成装置および画像形成方法

摘要

PROBLEM TO BE SOLVED: To provide a pigment that strikes a balance between the reduction of the amount of surfactant used in dispersion and the prevention of the degradation in stress resistance in a low-pH region of the pigment.SOLUTION: In the pigment, the maximal value of the slope of a surface carboxy group density dissociation curve to a pH obtained by titration using a sodium hydroxide solution is pH5 or lower.