| 主权项 |
1. A toner comprising a toner particle containing:
a binder resin, a pigment, a crystalline resin, and an amorphous resin,wherein,
an adsorption rate A1 of the crystalline resin to the pigment is from 5% to 40%, an adsorption rate A2 of the amorphous resin to the pigment is from 20% to 60%, and the adsorption rates A1 and A2 satisfy the following relationship: A1<A2 (1), wherein, in the relationship (1),
A1 represents an adsorption rate measured for a mixture obtained by mixing 0.1 mass part of the crystalline resin, 1.0 mass part of the pigment, and 20 mass part of a solvent in which 16 mass parts of styrene and 4 mass parts of n-butyl acrylate are mixed, andA2 represents an adsorption rate measured for a mixture obtained by mixing 0.1 mass part of the amorphous resin, 1.0 mass part of the pigment, and 20 mass parts of a solvent in which 16 mass parts of styrene and 4 mass parts of n-butyl acrylate are mixed, and a degree of compatibility represented by the following equation (2) is 70% or less:
degree of compatibility (%)=(1−B1/B2)×100 (2), wherein, in equation (2),
B1 represents an exothermic quantity per gram (J/° C.) of the crystalline resin at an exothermic peak derived from crystallization of the crystalline resin, measured with a differential scanning calorimeter in a secondly cooling step of a process including: heating a resin mixture from 30° C. to 200° C., the resin mixture containing the amorphous resin and the crystalline resin with a mass ratio of 9:1, subsequently cooling the resin mixture from 200° C. to 0° C., subsequently heating the resin mixture from 0° C. to 120° C., then keeping the resin mixture at 120° C. for 5 minutes, and secondly cooling the resin mixture from 120° C. to 0° C., andB2 represents an exothermic quantity per unit gram (J/° C.) of the crystalline resin at an exothermic peak derived from crystallization of the crystalline resin, measured with a differential scanning calorimeter in a secondly cooling step of a process including: heating the crystalline resin alone from 30° C. to 200° C., subsequently cooling the crystalline resin from 200° C. to 0° C., subsequently heating the crystalline resin from 0° C. to 120° C., then keeping the crystalline resin at 120° C. for 5 minutes, and secondly cooling the resin mixture from 120° C. to 0° C.,wherein the heating and the cooling in the processes for measuring B1 and B2 are each performed at a rate of 10° C./min. |
