Recording ink composition and recording method using the same

Claim 1

A recording ink composition comprising: a colorant which is soluble or dispersible in water and comprises at least one phthalocyanine compound represented by formula (1), ##STR18## wherein M is a hydrogen atom, Cu, Fe, Co or Ni, X is a halogen atom, and p is an integer of 0 to 8; and at least one phthalocyanine compound selected from the group consisting of compounds represented by formulas (2) and (3), ##STR19## wherein M is a hydrogen atom, Cu, Fe, Co or Ni; A is a phenylene group or a straight-chain or branched alkylene group having 1 or more carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanolamine cation, and q is an integer of 0 to 4, and r is an integer of 0 to 8, provided that q and r cannot be 0 (zero) at the same time; and ##STR20## wherein M is a hydrogen atom, Cu, Fe, Co or Ni, A is a phenylene group or a straight-chain or branched alkylene group having 1 or more carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanolamine cation, and s is an integer of 0 to 4, and t is an integer of 0 to 4, provided that s and t cannot be 0 (zero) at the same time; a dispersant comprising at least one dispersant component selected from the group consisting of at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and at least one surfactant having an alkyl group having 5 or more carbon atoms; water; and a humectant.

Claim 13

A method of recording images on an image receiving medium, comprising the step of ejecting a recording ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more, with said recording ink composition being deposited in an amount of 20 pl/mm 2 to 200 pl/mm 2 on said image receiving medium, thereby forming images with a resolution of 10 dots/mm×10 dots/mm or more, said recording ink composition comprising: a colorant which is soluble or dispersible in water and comprises at least one phthalocyanine compound represented by formula (1), ##STR30## wherein M is a hydrogen atom, Cu, Fe, Co or Ni, X is a halogen atom, and p is an integer of 0 to 8; and at least one phthalocyanine compound selected from the group consisting of compounds represented by formulas (2) and (3), ##STR31## wherein M is a hydrogen atom, Cu, Fe, Co or Ni; A is a phenylene group or a straight-chain or branched alkylene group having 1 or more carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanolamine cation, and q is an integer of 0 to 4, and r is an integer of 0 to 8, provided that q and r cannot be 0 (zero) at the same time; and ##STR32## wherein M is a hydrogen atom, Cu, Fe, Co or Ni, A is a phenylene group or a straight-chain or branched alkylene group having 1 or more carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanolamine cation, and s is an integer of 0 to 4, and t is an integer of 0 to 4, provided that s and t cannot be 0 (zero) at the same time; a dispersant comprising at least one dispersant component selected from the group consisting of at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and at least one surfactant having an alkyl group having 5 or more carbon atoms; water; and a humectant.

Claim 14

A method of recording images on an image receiving medium, comprising the step of ejecting a recording ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more, with said recording ink composition being deposited in an amount of 20 pl/mm 2 to 200 pl/mm 2 on said image receiving medium, thereby forming images with a resolution of 10 dots/mm×10 dots/mm or more, said recording ink composition comprising: a colorant which is soluble or dispersible in water and comprises at least one phthalocyanine compound represented by formula (1), ##STR30## wherein M is a hydrogen atom, Cu, Fe, Co or Ni, X is a halogen atom, and p is an integer of 0 to 8; and at least one phthalocyanine compound selected from the group consisting of compounds represented by formulas (2) and (3), ##STR31## wherein M is a hydrogen atom, Cu, Fe, Co or Ni; A is a phenylene group or a straight-chain or branched alkylene group having 1 or more carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanolamine cation, and q is an integer of 0 to 4, and r is an integer of 0 to 8, provided that q and r cannot be 0 (zero) at the same time; and ##STR32## wherein M is a hydrogen atom, Cu, Fe, Co or Ni, A is a phenylene group or a straight-chain or branched alkylene group having 1 or more carbon atoms, M + is a cation selected from the group consisting of alkali metal cation, quaternary ammonium cation, quaternary phosphonium cation, and alkanolamine cation, and s is an integer of 0 to 4, and t is an integer of 0 to 4, provided that s and t cannot be 0 (zero) at the same time; a dispersant comprising at least one dispersant component selected from the group consisting of at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and at least one surfactant having an alkyl group having 5 or more carbon atoms; water; and a humectant.