FLUIDITY IMPROVEMENT AID FOR TONER, FLUIDITY IMPROVING AGENT COMPRISING THE SAME AND DEVELOPING AGENT

摘要

A fluidity improvement aid for a toner, which comprises particles comprising a calcium phosphate type compound having a porous structure in a petal form and an atomic ratio of Ca/P of 1.67 to 16.7, and having specific ranges of an average particle size, a dispersion coefficient, a sharpness of particle size and a specific surface area. The use of the fluidity improvement aid for a toner allows the improvement of fluidity and leads to an excellent image exhibiting no fog.