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AssigneeRicoh Company, Ltd.
InventorsShohichi Sugimoto, Shinichi Kuramoto
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An image formation method for forming a full-color image includes the step of superimposing four yellow, magenta, cyan and black toner images which are respectively obtained by developing four latent electrostatic images, which respectively correspond to the four yellow, magenta, cyan and black toner images, with a yellow toner, a magenta toner, a cyan toner and a black toner, wherein a gradient aY of a yellow glossiness per unit amount of the yellow toner (mg/cm2) deposited on a transfer sheet, a gradient aM of a magenta glossiness per unit amount of the magenta toner (mg/cm2) deposited on the transfer sheet, and a gradient aC of a cyan glossiness per unit amount of the cyan toner (mg/cm2) deposited on the transfer sheet are in a range of 0.8 a to 1.2 a, and a gradient aBk of a black glossiness per unit amount of the black toner (mg/cm2) deposited on the transfer sheet is in a range of 0.4 a to 0.7 a, in which a=(aY+aM+aC)/3.
An image formation method for forming a color image comprising the step of superimposing, on a transfer sheet, four yellow, magenta, cyan and black toner images which are respectively obtained by developing four latent electrostatic images, which respectively correspond to said four yellow, magenta, cyan and black toner images, with said yellow toner, said magenta toner, said cyan toner and said black toner, wherein a gradient aY of a yellow glossiness per unit amount of said yellow toner (mg/cm2) deposited on said transfer sheet, a gradient aM of a magenta glossiness per unit amount of said magenta toner (mg/cm2) deposited on said transfer sheet, and a gradient aC of a cyan glossiness per unit amount of said cyan toner (mg/cm2) deposited on said transfer sheet are in a range of 0.8 a to 1.2 a, and a gradient aBK of a black glossiness per unit amount of said black toner (mg/cm2) deposited on said transfer sheet is in a range of 0.4 a to 0.7 a, in which a=(aY+aM+aC)/3, wherein each of said color toners comprises a coloring agent and a binder resin;
A full-color image formed by superimposing, on a transfer sheet, four yellow, magenta, cyan and black toner images which are respectively obtained by developing four latent electrostatic images, which respectively correspond to said four yellow, magenta, cyan and black toner images, with said yellow toner, said magenta toner, said cyan toner and said black toner, wherein a gradient aY of a yellow glossiness per unit amount of said yellow toner (mg/cm2) deposited on said transfer sheet, a gradient aM of a magenta glossiness per unit amount of said magenta toner (mg/cm2) deposited on said transfer sheet, and a gradient aC of a cyan glossiness per unit amount of said cyan toner (mg/cm2) deposited on said transfer sheet are in a range of 0.8 a to 1.2 a, and a gradient aBK of a black glossiness per unit amount of said black toner (mg/cm2) deposited on said transfer sheet is in a range of 0.4 a to 0.7 a, in which a=(aY+aM+aC)/3, wherein each of said color toners comprises a coloring agent and a binder resin;
Dependencies are inferred from the claim text.