Patent ID: 7160662

Claim:
An electrostatic latent image developing agent comprising a toner and a carrier, wherein: the surface of the toner is covered with a plurality of particles that comprises: at least first particles having a volume resistivity of 1×10 14 Ωcm or greater and an average primary particle diameter in a range of 40 nm to 50 nm, and second particles having a volume resistivity of 1×10 14 Ωcm or greater and an average primary particle diameter of less than 50 nm, wherein a total covering ratio on the surface of the toner of the second particles is higher than a total covering ratio of said at least first particles, and a sum of the total covering ratios of said at least first particles and said second particles is higher than a total covering ratio of other particles present on the toner surface; a shape factor SF 1 of the toner is in the range of from 100 to 140; the carrier is a resin coated carrier; and at least a coating resin layer of the resin coated carrier comprises a positively charging resin and a quaternary ammonium salt compound.