Three color toner kit and method of use

Claim 1

A method for forming multi-color images by electrostatography, comprising: developing eloctrostatic latent images with a yellow toner, a magenta toner, and a cyan toner; transferring the resultant color toner images to a recording medium, and fixing the transferred toner images on the recording medium, thereby to obtain multi-color images; wherein said yellow, magenta and cyan toners respectively comprising 100 parts by weight of a resin exhibiting a melt flow viscosity of 10 5 cp at a temperature of T 1 and a melt flow viscosity of 0.5×10 5 cp at a temperature of T 2 , said temperatures T 1 and T 2 satisfying the following relationships: T.sub.1 =100° to 150° C. and ΔT=|T.sub.1 -T.sub.2 |=5 to 30° C., and 0.3 to 10 parts by weight of a corresponding color of colorants selected from the group consisting of yellow colorants, magenta colorants, and cyan colorants (A) said yellow colorants being: (1) colorants represented by the formula (I): ##STR10## Wherein R 1 is a lower alkyl, R 2 and R 3 are each independently hydrogen or hydroxyl, R 4 is hydrogen or hydroxyl and R 5 is hydrogen, acyl, or amino having a terminal acyl; and (2) colorants to be classified under C.I. Disperse Yellow 164, (B) said magenta colorants being: (3) the colorant represented by the formula (II): ##STR11## and (4) colorants represented by the formula (III): ##STR12## wherein X is a substituent represented by the formula: ##STR13## R 1 is hydrogen, alkyl, hydroxyl, phenyl or phenyl having a hydrogen, halogen or alkyl substituent, sulfo or any of salts thereof with alkali metals, alkaline earth metals, ammonium ion, aliphatic ammonium ion or heterocyclic ammonium ion; Z 1 and Z 2 are each independently hydrogen, hydroxy or alkyl, (C) said cyan colorants being: (5) colorants represented by formula (IV): ##STR14## wherein X 1 , X 2 , X 3 and X 4 are each independently: ##STR15## wherein R and R' are an alkylene having 1 to 5 carbon atoms, with the proviso that the number of hydrogen atoms in each of X 1 -X 4 is any of 0, 1, 2 and 3.

Claim 2

A method for forming multi-color images by electrostatography, comprising: developing eloctrostatic latent images with a yellow toner, a magenta toner, and a cyan toner; transferring the resultant color toner images to a recording medium, and fixing the transferred toner images on the recording medium, thereby to obtain multi-color images; wherein said yellow, magenta and cyan toners respectively comprising 100 parts by weight of a resin exhibiting a melt flow viscosity of 10 5 cp at a temperature of T 1 and a melt flow viscosity of 0.5×10 5 cp at a temperature of T 2 , said temperatures T 1 and T 2 satisfying the following relationships: T.sub.1 =100° to 150° C. and ΔT=|T.sub.1 -T.sub.2 |=5 to 30° C., and 0.3 to 10 parts by weight of a corresponding color of colorants selected from the group consisting of yellow colorants, magenta colorants, and cyan colorants (A) said yellow colorants being: (1) colorants represented by the formula (I): ##STR10## Wherein R 1 is a lower alkyl, R 2 and R 3 are each independently hydrogen or hydroxyl, R 4 is hydrogen or hydroxyl and R 5 is hydrogen, acyl, or amino having a terminal acyl; and (2) colorants to be classified under C.I. Disperse Yellow 164, (B) said magenta colorants being: (3) the colorant represented by the formula (II): ##STR11## and (4) colorants represented by the formula (III): ##STR12## wherein X is a substituent represented by the formula: ##STR13## R 1 is hydrogen, alkyl, hydroxyl, phenyl or phenyl having a hydrogen, halogen or alkyl substituent, sulfo or any of salts thereof with alkali metals, alkaline earth metals, ammonium ion, aliphatic ammonium ion or heterocyclic ammonium ion; Z 1 and Z 2 are each independently hydrogen, hydroxy or alkyl, (C) said cyan colorants being: (5) colorants represented by formula (IV): ##STR14## wherein X 1 , X 2 , X 3 and X 4 are each independently: ##STR15## wherein R and R' are an alkylene having 1 to 5 carbon atoms, with the proviso that the number of hydrogen atoms in each of X 1 -X 4 is any of 0, 1, 2 and 3.