Patent ID: 7892717

Claim:
A toner for electrostatic image development comprising a binder resin and a colorant, wherein an existence ratio of an IA Group element, from which hydrogen is excluded, measured by XPS (X-ray Photoelectron Spectroscopy) is in a range of about 0.03 to 1.0 atom %, and a total of existence ratios of an IIA Group element, an IIIB Group element and an IVB Group element, from which carbon is excluded, measured by XPS is in a range of about 0.05 to 2.0 atom %, and wherein a ratio (G′(65)/G′(90)) of a storage modulus G′(65) at 65° and a storage modulus G′(90) at 90° C. at a measurement frequency of 1 (rad/sec) in dynamic viscoelasticity measurement by a sine wave vibration method is in a range of about 1×10 3 to 1×10 5 .