Patent ID: 6432599
Filing Date: 2002-08-13
Classification: G03G

Abstract:
A toner comprising a toner base and an external additive, the toner base comprising a binder resin, a colorant and a fixing assistant,the fixing assistant includes an ester-based wax having a number average molecular weight Mn of 100 to 5000, a weight average molecular weight Mw of 200 to 10000, Mw/Mn of not more than 8, a heating loss at 220Â° C. of not more than 8 wt %, an iodine value of not more than 25, and a saponification value of 30 to 300, the toner base is subject to a surface treatment by hot air, and the external additive comprises fine powder of at least one selected from the group consisting of titanium oxide and silica oxide.