Patent ID: 7601475

Claim:
A carrier comprising: a core material, and a resin coating layer formed on a surface of the core material, the resin coating layer containing alumina particles, X-ray intensity of the alumina particles measured by a fluorescent X-ray analysis being smaller than that of a metal which is a metal contained in the core material in a largest amount measured by the fluorescent X-ray analysis, wherein a ratio between the X-ray intensity of the alumina particles in the resin coating layer measured by the fluorescent X-ray analysis and the X-ray intensity of the metal which is a metal contained in a largest amount in the core material measured by the fluorescent X-ray analysis (X-ray intensity of alumina particles/X-ray intensity of metal) is in a range of 3.58×10 −3 to 1.52×10 −2 , the core material is an iron-type magnetic material having particles of a volume average particle diameter in a range of 10 μm to 150 μm, alumina particles have an average particle diameter of 10 nm to 500 nm, the amount of alumina particles is 5 to 15 parts by weight on the basis of 100 parts by weight of the synthetic resin in the coating layer, and the synthetic resin contains at least one resin selected from among a polyester, an acrylic resin, and a silicone resin.