| 摘要 |
PROBLEM TO BE SOLVED: To provide a development device and an image forming apparatus that are capable of creating a pressure-bonding postcard which keeps good fixability and a good storage property while being excellent in adhesiveness and being capable of preventing the generation of transition of characters when the postcard is peeled and opened.SOLUTION: Provided is a development device that performs development by a combination of an achromatic developer and a color developer that satisfies the relationship of 45°C≤Tg2t≤52°C, 106°C≤Tg2c, and 57°C≤Tg2c-Tg2t≤64°C, in which Tg1t is a glass transition temperature obtained by a midpoint method from a first peak of temperature rise according to the measurement by a differential scanning calorimeter of the achromatic developer containing no pigment, and Tg2t is a glass transition temperature obtained by a midpoint method from a second peak of temperature rise, and in which Tg1c is a glass transition temperature obtained by a midpoint method from a first peak of temperature rise according to the measurement by a differential scanning calorimeter of a color developer containing a pigment, and Tg2c is a glass transition temperature obtained by a midpoint method from a second peak of temperature rise. Also provided is an image forming apparatus comprising the development device. |
