Patent ID: 7110710

Claim:
An image-forming apparatus comprising: a latent electrostatic image support; and an image-developer, which comprises a developer and a developer-bearing member configured to have a development sleeve on an outermost surface thereof, and to carry the developer on the surface thereof, wherein the developer-bearing member has at least a main magnetic pole for forming magnetic brushes, where the latent electrostatic image support and the development sleeve come to close to each other with the shortest distance, when the developing sleeve has a point “A” on a surface thereof and on a normal based on the main magnetic pole, and has a point “B” being 1 mm distant from the point “A” in a direction of the normal to the surface thereof, the point “B” has an attenuated magnetic flux density of 0 to 40 with respect to a magnetic flux density of 100 on the point “A”, a half width of a magnetic flux density distribution curve of the main magnetic pole, is 5° to 20°, the developer is transported at a linear velocity of 150 mm/sec to 500 mm/sec, and the developer contains a toner which comprises: a resin particle containing a coloring agent; and a charge control agent particle, mixed with the resin so as to form a toner particle of the toner, wherein a ratio (M/T) of an amount M (% by weight) of an element in a surface of the toner particle to an amount T (% by weight) of an element in an entire portion of the toner particle is 20 to 500, the element is contained only within the charge control agent particle, and the element is selected from the first period to the fifth period in a long form of periodic table, excluding a hydrogen element, a carbon element, an oxygen element, and rare gas elements, the resin particle contains a toner compound having at least a binder resin and a coloring agent, the toner compound is one of dispersed and dissolved in an organic solvent so as to form one of a toner compound-dispersed solvent and a toner compound-dissolved solvent, thereafter one of the toner compound-dispersed solvent and the toner compound-dissolved solvent is dispersed in an aqueous solution so as to form an emulsion, and a solvent of the emulsion is removed so as to form the resin particle.