Patent ID: 8741523

Claim:
A toner tor developing an electrostatic image comprising a toner particle containing a binding resin, wherein, in a viscoelastic image of a cross section of the toner particle observed via an atomic force microscope, the binding resin has a domain-matrix structure composed of a high elastic resin composing a domain and a low elastic resin composing a matrix, an arithmetic mean value of ratio (L/W) of the Length L, to Width W of the domains is 1.5 to 5.0, and domains having Length A in the range of 60 to 500 nm exist 80 number % or more, and domains having Width W in the range of 45 to 100 nm exist 80 number % or more, a glass transition point of the high elastic resin composing the domain is 60 to 80° C., and a glass transition point of the low elastic resin composing the matrix is 25 to 50° C.