Patent ID: 8603713

Claim:
A toner, comprising: a colorant; an amorphous polyester resin (a) consisting essentially of units from a hydroxycarboxylic acid having 2 to 6 carbon atoms; and a block copolymer (b) having (i) a block of an amorphous polyester consisting essentially of units from a hydroxycarboxylic acid having 2 to 6 carbon atoms and (ii) a block of an amorphous polyester consisting essentially of units from a diol and a dicarboxylic acid; wherein the units from the hydroxycarboxylic acid having 2 to 6 carbons of amorphous polyester resin (a) are formed from an optically-active monomer, and wherein the hydroxycarboxylic acid having 2 to 6 carbons of amorphous polyester resin (a) has an optical purity X (%) of 85% or less, the optical purity X (%) being represented by the following formula: X (%)=|X(L-isomer)−X(D-isomer); wherein X(L-isomer) and X(D-isomer) represent molar ratio (%) of L-isomer and D-isomer of the optically-active monomer, respectively.