Abstract: An inkjet ink includes a binder resin, a tackifier, a colorant, and an organic solvent. The binder resin is a phenol resin having a softening point in a range from 70 degrees Celsius or more to 125 degrees Celsius or less. The colorant is a dye. The tackifier is a terpene phenol resin whose hydroxyl value is 10 to 45 mgKOH/g.

Abstract: An inkjet ink includes a polyamide resin; at least one tackifier that is selected from the group consisting of a terpene phenol resin and a rosin ester, and that has a hydroxyl value that ranges from 10 to 45 mgKOH/g; a solvent dye; and an alcohol having 1 to 3 carbon atoms. The inkjet ink has quick-drying properties, is capable of satisfactorily improving printing fixability with respect to a non-absorptive printing object made of polyolefin or the like, is excellent in storage stability so that precipitation etc., do not easily occur for a long time, and is excellent in intermittent printability so that the nozzle of an inkjet printer is not easily clogged during a decapping time.

Abstract: [Problem] An inkjet ink is provided that is characterized by being excellent in intermittent printability particularly in being used in an on-demand type inkjet printer, that is characterized in that printings are not easily blurred when printing is restarted, and that is characterized in that printings that have been printed on a metal surface or a low-polarity surface or the like are not easily blurred or do not easily come off even if the printings are repeatedly rubbed with a fingertip or the like. [Solution] A phenol resin whose softening point is 70 to 125° C., a tackifier, a colorant, and an organic solvent were compounded together. It is preferable to use an alcohol having one to three carbon atoms as the organic solvent. Additionally, it is preferable to use a terpene phenol resin whose hydroxyl value is 10 to 45 mgKOH/g as the tackifier in dye-based compounding, and it is preferable to use a rosin ester resin whose acid value is 2 to 10 mgKOH/g as the tackifier in pigment-based compounding.

Abstract: [Problem] An inkjet ink is provided that has quick-drying properties, that is capable of satisfactorily improving printing fixability with respect to a non-absorptive printing object made of polyolefin or the like, that is excellent in storage stability so that precipitation etc., do not easily occur for a long time, and that is excellent in intermittent printability so that a nozzle of an inkjet printer is not easily clogged for a decapping time. [Solution] A terpene phenol resin and/or a rosin ester that serve as a tackifier and whose hydroxyl value is 10 mgKOH/g or more and is 45 mgKOH/g or less were compounded with a polyamide resin, an alcohol having 1 to 3 carbon atoms, and an solvent dye.

Abstract: A non-aqueous inkjet ink includes a polyvinyl chloride resin synthesized by a suspension polymerization method or an emulsion polymerization method, an organic solvent that is a mixed solvent including diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, and diethylene glycol monoethyl ether in which the polyvinyl chloride resin is dissolved. This inkjet ink also includes a pigment, and a radical polymerization inhibitor. The radical polymerization inhibitor prevents the polyvinyl chloride resin from gelling in a short period and causing a discharge fault, clogging, etc. An ink set of inkjet inks includes a combination of the non-aqueous inkjet inks above having respective colors and including at least a cyan ink, a magenta ink, a yellow ink, and a black ink.

Abstract: Disclosed is a non-aqueous inkjet ink that includes a polyvinyl chloride resin synthesized by a suspension polymerization method or an emulsion polymerization method; an organic solvent that is a mixed solvent comprising diethylene glycol ethyl methyl ether, diethylene glycol diethyl ether, and diethylene glycol monoethyl ether in which the polyvinyl chloride resin is dissolved; a pigment; and a radical polymerization inhibitor. In another embodiment, the mixed solvent includes N-methyl-2-pyrrolidone, diethylene glycol diethyl ether, and diethylene glycol monoethyl ether. The radical polymerization inhibitor prevents the polyvinyl chloride resin from gelling in a short period and causing a discharge fault, clogging, etc. Also disclosed is an ink set of inkjet inks includes a combination of the non-aqueous inkjet inks above having respective colors and including at least a cyan ink; a magenta ink; a yellow ink; and a black ink.

Abstract: A non-aqueous inkjet ink includes a polyvinyl chloride resin synthesized by a suspension polymerization method or an emulsion polymerization method and has blended therein a radical polymerization inhibitor for preventing the polyvinyl chloride resin from gelling in a short period and causing a discharge fault, clogging, etc. With an ink set, at least one of inks of respective colors of at least cyan, magenta, yellow, and black is the non-aqueous inkjet ink.

Abstract: An inkjet ink and a method for printing on hydrophobic media such as offset coated media, using the inkjet ink, including an inkjet containing a pigment, water, a surfactant and 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium.

Abstract: Disclosed are an inkjet ink and a method for printing on hydrophobic media such as offset coated media using the inkjet ink. Specifically disclosed is an inkjet containing a pigment, water and a surfactant which is characterized by also containing 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium. Such an inkjet ink enables better printing on hydrophobic media such as offset coated media than the conventional inks.

Abstract: An inkjet ink and a method for printing on hydrophobic media such as offset coated media, using the inkjet ink, including an inkjet containing a pigment, water, a surfactant and 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium.

Abstract: A inkjet ink and a method for printing on hydrophobic media such as offset coated media using the inkjet ink. An inkjet contains a pigment, water, a surfactant and 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium.

Abstract: The invention provides an ink composition comprising a silver colloid and an antitarnish agent for preventing discoloration of silver. Despite the use of a silver colloid which is likely to discolor, as a colorant, discoloration of the printing face in a relatively short period can be prevented, and good metal gloss of the printing face can be maintained over a longer period of time than that attained by the prior art technique.

Abstract: Disclosed are an inkjet ink and a method for printing on hydrophobic media such as offset coated media using the inkjet ink. Specifically disclosed is an inkjet containing a pigment, water and a surfactant which is characterized by also containing 40 to 75 weight % of a polar non-protic solvent with a molecular weight of 40 to 130 which has permeability to a hydrophobic surface such as the coating of an offset coated medium. Such an inkjet ink enables better printing on hydrophobic media such as offset coated media than the conventional inks.