Abstract: A multilayer electronic component includes a multilayer body including dielectric layers and inner electrode layers, the multilayer body including an electrode facing portion in which the inner electrode layers are laminated to face each other with the dielectric layers interposed therebetween. The multilayer body has a thickness of at least about 1.5 mm in a lamination direction, a length of at least about 3.0 mm, and a width of at least about 1.5 mm. Each of the dielectric layers includes Ba, Ti, and Cl. A Cl concentration C1 in the entire electrode facing portion satisfies about 10 wtppm<C1<about 50 wtppm. On an imaginary central axis line, a Cl concentration C2 in a central portion of the electrode facing portion and a Cl concentration C3 in both end portions of the electrode facing portion satisfy about 0.5C2?C3<C2.

Abstract: A multilayer electronic component includes a multilayer body including dielectric layers and inner electrode layers, the multilayer body including an electrode facing portion in which the inner electrode layers are laminated to face each other with the dielectric layers interposed therebetween. The multilayer body has a thickness of at least about 1.5 mm in a lamination direction, a length of at least about 3.0 mm, and a width of at least about 1.5 mm. Each of the dielectric layers includes Ba, Ti, and Cl. A Cl concentration C1 in the entire electrode facing portion satisfies about 10 wtppm?C1?about 50 wtppm. On an imaginary central axis line, a Cl concentration C2 in a central portion of the electrode facing portion and a Cl concentration C3 in both end portions of the electrode facing portion satisfy about 0.5C2?C3<C2.

Abstract: The present invention provides a magnetic monocomponent developer which can obtain a stable conveying performance for a long period and an image forming method which uses the developer. In a magnetic monocomponent developer which is used in a developing unit which includes a developing vessel which accommodates a magnetic monocomponent developer therein, a developer carrying body which carries the magnetic monocomponent developer and conveys the magnetic monocomponent developer to a developing region, and a developer layer thickness restricting member which restricts a layer thickness of the magnetic monocomponent developer, the magnetic monocomponent developer includes toner particles which contain at least a binder resin and magnetic powder, and also includes following constitutions (a) to (c). (a) an average particle size of the toner particles may being set to a value which falls within a range from 6 to 9 ?m.

Abstract: A magnetic one-component toner of the invention contains at least a binding resin and a magnetic powder, and has a volume average particle size of 6.0 to 9.0 ?m, a compressibility of 15 to 50%, and a mean roundness of 0.950 to 0.960. The magnetic powder has at its surface a phosphorus element of 0.10 to 0.50% by weight. This toner is suitable for use in an image forming apparatus provided with a developer carrier made of stainless steel, or an image forming apparatus provided with an amorphous silicon photosensitive material. This toner has high transfer efficiency and less fog, thereby enabling to maintain image density for a long period of time, and form high image-quality image.

Abstract: The present invention provides a magnetic monocomponent developer which can obtain a stable conveying performance for a long period and an image forming method which uses the developer. In a magnetic monocomponent developer which is used in a developing unit which includes a developing vessel which accommodates a magnetic monocomponent developer therein, a developer carrying body which carries the magnetic monocomponent developer and conveys the magnetic monocomponent developer to a developing region, and a developer layer thickness restricting member which restricts a layer thickness of the magnetic monocomponent developer, the magnetic monocomponent developer includes toner particles which contain at least a binder resin and magnetic powder, and also includes following constitutions (a) to (c). (a) an average particle size of the toner particles may being set to a value which falls within a range from 6 to 9 ?m.

Abstract: A magnetic one-component toner of the invention contains at least a binding resin and a magnetic powder, and has a volume average particle size of 6.0 to 9.0 ?m, a compressibility of 15 to 50%, and a mean roundness of 0.950 to 0.960. The magnetic powder has at its surface a phosphorus element of 0.10 to 050% by weight. This toner is suitable for use in an image forming apparatus provided with a developer carrier made of stainless steel, or an image forming apparatus provided with an amorphous silicon photosensitive material. This toner has high transfer efficiency and less fog, thereby enabling to maintain image density for a long period of time, and form high image-quality image.

Abstract: A developing apparatus has a developer supporting member 41 with a surface roughness RZ in the range from 3.0 to 5.5 &mgr;m and a one-component developer T with a bulk density in the range from 0.35 to 0.55 g/ml, and an image is developed by forming a layer of the developer T on the developer supporting member 41. This makes it possible to form a thin toner layer stably despite changes in ambient conditions, and to prevent low image density and fogging. The absolute value of the amount of electric charge with which the developer T is charged is preferably in the range from 3.0 to 10.0 &mgr;C/g. The developer supporting member 41 is made preferably of stainless steel.

Abstract: A developing apparatus has a developer supporting member 41 with a surface roughness RZ in the range from 3.0 to 5.5 &mgr;m and a one-component developer T with a bulk density in the range from 0.35 to 0.55 g/ml, and an image is developed by forming a layer of the developer T on the developer supporting member 41. This makes it possible to form a thin toner layer stably despite changes in ambient conditions, and to prevent low image density and fogging. The absolute value of the amount of electric charge with which the developer T is charged is preferably in the range from 3.0 to 10.0 &mgr;C/g. The developer supporting member 41 is made preferably of stainless steel.

Abstract: A toner for electrophotography is so prepared that a wax in a binder resin has an average diameter in the range from 0.1 to 3.0 &mgr;m so as to alleviate hot offsetting and filming, and that the toner contains 1.0 to 2.5% by volume of a fine particle toner with particle diameters of 5.04 &mgr;m or smaller so as to grind, at an early stage, the toner components that have attached to a photoconductor and thereby prevent filming.

Abstract: A magnetic carrier for electrophotographic developing agent wherein the surfaces of the magnetic core particles are partly coated with a thermosetting resin and a small amount of a low-melting or low-softening thermoplastic resin or wax, and at least recessed portions of the core particles are filled with these coating materials. The magnetic carrier has an electric resistance that is maintained within a range that is suited for forming the image, and suppresses the occurrence of spent toner.