abstract |
(57) [Problem] To provide a toner for developing an electrostatic image, which has good low-temperature fixability, offset resistance, and blocking resistance irrespective of transfer paper. SOLUTION: The toner for developing an electrostatic image containing a binder resin, a colorant and a wax has (a) a ratio of a loss elastic modulus to a storage elastic modulus (G ″ / G ′ = tan δ) of 1. The temperature at which the temperature becomes 0 is in the temperature range of 55 to 70 ° C., the elastic modulus at that time is 1.5 × 10 8 Pa or less, and (b) the storage elastic modulus (G ′ 40 ) and the storage elastic modulus (G 'ratio of 50) (G' 40 / G '50) is 1.5 to 5.0, (c) the storage elastic modulus (G''ratio of 60) (G' 50) and the storage modulus (G 50 / G '60) is 3 to 20, (d) storage modulus (G''ratio of 100) (G' 70) and the storage modulus (G 70 / G '100) is 50 to 250, (e) storage modulus (G''ratio of 140) (G' 110) and the storage modulus (G 110 / G ′ 140 ) is 2 to 20. |