Patent ID: 6171743
Filing Date: 2001-01-09
Classification: G03G

Abstract:
An electrostatic latent image-developing toner produced by a wet granulation method, containing at least a binder resin and a colorant, and having a volume-area mean particle size (D) of 1 to 10 .mu.m, a shape coefficient (S) of 103 to 130, and a constant (A) of 0.25 to 2,the volume-area mean particle size (D) being defined by the below equation (1): ##EQU13##wherein ""ni"" and ""Di"" respectively denote ""the number of particle"" and ""particle size (representative diameter)"" of each particle size division in the distribution of number-standard particle size;the shape coefficient (S) being defined by the below equation (2): ##EQU14##wherein ""perimeter"" and ""area"" respectively denote perimeter and area of the projected image of toner particle; andthe constant (A) being defined by the below equation (3): ##EQU15##wherein ""SB"" denotes a BET specific surface and ""SW"" is defined by the below equation: ##EQU16##wherein "".rho."" denotes a specific gravity of toner, ""D"" and ""S"" respectively denote the above-mentioned volume-area mean particle size (D) and shape coefficient (S).