Patent ID: 7642030

Claim:
A toner comprising toner particles each containing a resin and a colorant, wherein the toner particle has: a region A which contains the colorant and a region B through which more electrons can pass than the region A, the region A is covered by the region B and the region A is within 1 μm deep from a circumference of the toner particle, when the toner particle is observed in a state of a microscopic segment having a thickness of 80 to 200 nm through a transmission electron microscope at an acceleration voltage of 80 kV, the region A comprises a resin derived from styrene or its derivative monomer, the region B comprises a resin made of 2-ethylhexyl acrylate, the region A is made of a different resin than the region B, a solubility parameter value of the resin in the region B is lower than that of the resin in the region A and the difference between the solubility parameter values is 0.2 to 0.8, and the region A is prepared by emulsifying polymerization to obtain the resin and salting out and bonding of the resin.