Toner and resin composition for the toner

A toner, comprising:

• at least a binder resin, a colorant and a wax, wherein
• the binder resin has been formed from monomers including a vinyl monomer and polyester-forming monomers containing at least a polybasic carboxylic acid having three or more carboxyl groups or its anhydride, and comprises at least a hybrid resin comprising a vinyl polymer unit and a polyester unit,
• the toner contains a THF (tetrahydrofuran)-soluble content which includes a first component having a molecular weights of below 1×104 containing W1 (mol. %) of the polybasic carboxylic acid and its anhydride based on the polyester-forming monomers contained in the first component and a second component having a molecular weight of at least 1×104 containing W2 (mol. %) of the polybasic carboxylic acid and its anhydride based on the polyester-forming monomers contained in the second component, W1 and W2 satisfying the following relationship:
• 0.1×W2<W2−W1<0.5×W2,
• 0≦W1<30,
• 0<W2<50, and
• W2>W1,
• the THF-soluble content provides a GPC (gel permeation chromatography) chromatogram including 40-70 wt. % (M1) of a component having molecular weights of below 1×104, 25-50 wt. % (M2) of a component having molecular weights of 1×104-5×104, 2-25 wt. % (M3) of a component having molecular weights of above 5×104, and below 10 wt. % (M4) of a component having molecular weights of at least 10×104, M1, M2 and M3 satisfying the following relationship:
• M1≧M2>M3.