Patent ID: 7052814

Claim:
A toner for use in an oil-less fixing system free from an oil coating on a fixing roller, the toner comprising: a binder resin and a wax, as well as carbon black having an oil absorption of 50 to 100 mL/100 g where the toner is a black toner, or a binder resin and a wax as well as a coloring agent where the toner is a color toner, wherein said binder resin has a rate of decrease of storage elastic modulus G′ of not more than 0.3 Pa/C as determined in association with temperature increase in the range of 160 to 200C and a weight average molecular weight [Mw] in the range of 10,000 to 200,000 and an [Mw/Mn] ratio between [Mw] and a number average molecular weight [Mn] of the binder resin in the range of 3 to 12.