Full color image forming method using two cyan toners

摘要

Provided is a full color image forming method wherein high color reproducibility especially on a blue system and a green system can be obtained and an excellent gradation property can be obtained in a full color image to be obtained. The full color image forming method for forming a full color image by using at least yellow toner, magenta toner, and two kinds of cyan toners (1, 2) is characterized in that a toner image formed by the cyan toner (1) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of lightness (L*) in a color space represented by an L*a*b* colorimetric system of not less than 30 and not more than 52, and that a toner image formed by the cyan toner (2) alone has the value of the maximum color saturation (C*) of not less than 50 and the value of the lightness (L*) in the color space represented by the L*a*b* colorimetric system of not less than 58 and not more than 75.

主权项

1. A method for forming a full color image using at least a yellow toner, a magenta toner, a cyan toner (1) and a cyan toner (2), the method comprising the steps of:
(a) forming a toner image by developing an electrostatic latent image formed on an electrostatic latent image carrier by employing a developer, (b) transferring the toner image formed on the electrostatic latent image carrier onto an image support, and (c) fixing the toner image transferred onto the image support, wherein a toner image formed by using solely the cyan toner (1) exhibits: a maximum chroma C* of 50 or more; and a lightness L* of 30 to 52 in a color space represented by L*a*b* colorimetric system, a toner image formed by using solely the cyan toner (2) exhibits: a maximum chroma C* of 50 or more; and a lightness L* of 58 to 75 in a color space represented by L*a*b* colorimetric system; and the cyan toner (2) contains a colorant represented by Formula (I): wherein M1 represents a silicon atom, and Z1 represents Formula (II): wherein Z2 to Z4 each independently represents an alkyl group of 1 to 22 carbon atoms; and aryloxy group of 6 to 18 carbon atoms; or an alkoxy group of 1 to 22 carbon atoms, and A1 to A4 each independently represents a group of atoms which forms a benzene ring.