Patent ID: 11899395
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The toner according to claim 1, wherein 0.90≤M2/M1, 0.90≤Si2/Si1, and M1 and M2 are independently 1.00 to 10.00,
when M refers to a metal element contained in the polyhydric acid metal salt, M1 (atomic %) is a ratio of M in constituent elements of a surface of the toner determined from a spectrum obtained using x-ray photoelectron spectroscopic analysis of the toner, Si1 (mass %) is a mass ratio of the organosilicon polymer contained in the toner determined from a spectrum obtained by fluorescent x-ray analysis of the toner, M2 (atomic %) is a ratio of M in constituent elements of a surface of toner (a) determined from a spectrum obtained using x-ray photoelectron spectroscopic analysis, and Si2 (mass %) is a mass ratio of the organosilicon polymer contained in toner (a) determined from a spectrum obtained by fluorescent x-ray analysis, where toner (a) is obtained by dispersing 1.0 g of the toner in an aqueous mixed solution comprising 31.0 g of a 61.5 mass % aqueous sucrose solution and 6.0 g of a 10 mass % aqueous solution of a neutral detergent for cleaning precision measurement instrumentation comprising a nonionic surfactant, anionic surfactant and organic builder, and shaking at 300 times per minute for 20 minutes using a shaker.