JP2009205047A5 - - Google Patents

Claims (7)

In an image forming method comprising at least a developing step of developing a latent electrostatic image formed on a latent image carrier with a toner carried on the toner carrier to form a toner image,
The toner carrier is composed of a fixed magnet on the inside and a toner transport carrier that is rotatable on the outside, and the maximum valley depth is Rv with respect to an average value that bisects the surface roughness area of the toner transport carrier. A toner carrier having a shape factor (K) represented by the following formula (1) of 0.12 or more and 0.50 or less when the maximum height is Rmax;
K = Rv / Rmax (1)
The toner is a toner having toner particles containing at least a binder resin and a colorant, and the toner particles are flow type particles having an image processing resolution of 512 × 512 pixels (0.19 μm × 0.19 μm per pixel). An image forming method, wherein toner particles having an equivalent circle diameter of 0.25 μm or more and 1.98 μm or less measured by an image measuring device are 0% by number or more and 15.0% by number or less . Toner particles having an equivalent circle diameter of 0.25 μm or more and 1.98 μm or less measured by a flow type particle image measuring apparatus having an image processing resolution of 512 × 512 pixels (0.19 μm × 0.19 μm per pixel) of the toner particles, 2. The image forming method according to claim 1, wherein the number is 0% by number or more and 10.0% by number or less. The weight average particle diameter of the toner particles (D4) is 4.0μm to 15.0 .mu.m, claim 1, and a BET specific surface area is equal to or less than 0.80 m ² / g or more 2.00 m ² / g Or the image forming method of 2 . The image forming method according to any one of claims 1 to 3, wherein the colorant is a magnetic iron oxide particles. The ratio X of Fe (2+) in the total amount of Fe dissolved in the magnetic iron oxide particles until the Fe element dissolution rate reaches 10% by mass is 34% or more and 50% or less. 5. The image forming method according to 4 . The image forming method according to any one of claims 1 to 5, characterized in that the maximum height Rmax of the surface roughness of the toner conveyance carrier is 4μm or more 10μm or less. The image forming method according to any one of claims 1 to 6, characterized in that the the surface roughness of mountains and the average distance between the peaks of the toner conveyance carrier Sm is 30μm or more 60μm or less.