POSITIVE-CHARGE TYPE BLACK TONER

PROBLEM TO BE SOLVED: To provide a positive-charge type black toner superior in offset resistance in fixing, low-temperature fixability, sharp meltability, blocking resistance, charging characteristics, pulverizability and carbon black dispersibility and capable of forming properly developed images over a prolonged period of time, by using a linear polyester resin, prepared without using bisphenol A or the derivative thereof, as alcohol component and specific carbon blacks. SOLUTION: In the positive charge type black toner containing a binder resin and the carbon black, the binder resin is the linear polyester resin which comprises an acid component, consisting of (1) disproportionated rosin and (2) terephthalic acid and/or isophthalic acid and an alcohol component, consisting of (3) a glycidyl ester of a tertiary fatty acid and (4) a 2-4C aliphatic diol and has acidic value of