Full-color image-forming method

摘要

Provided are a toner containing at least a binder resin and a colorant, the toner having a specific hue angle and an absorbance at a specific wavelength in reflectance spectrophotometry, and a full-color image-forming method involving the use of the toner, the method including the steps of: forming an electrostatic image on a charged electrostatic image bearing member; developing the formed electrostatic image with the toner to form a toner image; transferring the formed toner image onto a transfer material; and fixing the transferred toner image to the transfer material to form a fixed image.

主权项

1. An image-forming method, comprising:
forming a black image by forming an electrostatic latent image on an electrostatic image bearing member, and developing the electrostatic latent image with a black toner; and transferring the black image onto a transfer material, wherein: the black toner contains a binder resin and a colorant, the colorant is contained in the black toner in an amount of from 8 parts by mass to 18 parts by mass based on 100 parts by mass of the binder resin, and the colorant is dispersed in the binder resin so that the black toner has a value (c*K) for c* based on a CIELAB color coordinate system of 20.0 or less, an absorbance (AK600) at a wavelength of 600 nm of 1.610 or more, and a ratio (AK600/AK460) of AK600 to an absorbance (AK460) at a wavelength of 460 nm of 0.970 to 1.035 in reflectance spectrophotometry, and wherein, when a true density of the black toner is represented by ρTK and a toner amount upon development of image data represented by the CIELAB color coordinate system with L*=13.2, a*=1.3, and b*=1.9 onto the transfer material is represented by M1K (mg/cm2), a coloring coefficient AK represented by the following expression is 3.0 to 12.0
AK=AK600/(M1K×ρTK).