An ink jet composition of the present disclosure includes: water; a polyester resin having sulfo groups; a colorant; and a high molecular weight dispersant having anionic groups, the colorant is contained in particles formed from a material containing the polyester resin, and a rate X1 [percent on molar basis] of the sulfo groups to all constituent monomers of the polyester resin is lower than a rate X2 [percent on molar basis] of the anionic groups to all constituent monomers of the high molecular weight dispersant.

An ink jet composition of the present disclosure includes: water; a polyester resin having sulfo groups; a colorant; and a high molecular weight dispersant having anionic groups, the colorant is contained in particles formed from a material containing the polyester resin, and a rate X1 [percent on molar basis] of the sulfo groups to all constituent monomers of the polyester resin is lower than a rate X2 [percent on molar basis] of the anionic groups to all constituent monomers of the high molecular weight dispersant.

An inkjet ink that includes (A) a terpene resin made from α-pinene and (B) methyl ethyl ketone, which is characterized by extended decap times as well as quick drying properties when applied onto a substrate. A printed article including the inkjet ink in dried form, and a method of forming a printed image with a thermal inkjet printhead are also provided.

An ink set includes a first ink containing the compound represented by formula (y-1) or its salt, a second ink containing one or two or more of the compound represented by formula (m-1) or its salt, the compound represented by formula (m-2) or its salt, a compound represented by formula (m-3) or its salt, and the compound represented by formula (m-4) or its salt, and a third ink containing one or two or more of a compound represented by formula (c-1) or its salt, the compound represented by formula (c-2) or its salt, the compound represented by formula (c-3) or its salt, a compound represented by formula (c-4) or its salt, and the compound represented by formula (c-5) or its salt. ##STR00001##

A thermal ink jet ink composition includes one or more volatile organic solvents, wherein the one or more volatile organic solvents comprise a solvent selected from C.sub.1-C.sub.4 alcohols, C.sub.3-C.sub.6 ketones, C.sub.3-C.sub.6 esters, C.sub.4-C.sub.8 ethers, and mixtures thereof. The one or more volatile organic solvents are present in an amount at least 60% by weight of the ink composition. The ink composition includes one or more binder resins present in an amount from 1% to 10% by weight of the ink composition, and one or more dyes. If water is present, it is present in amount less than 5% by weight of the ink composition. The ink composition includes less than 2% by weight of any humectant and/or wetting agent with a relative evaporation rate less than 0.3. The ink composition is suitable for use in a thermal ink jet printer.

A thermal ink jet ink composition includes one or more volatile organic solvents, wherein the one or more volatile organic solvents comprise a solvent selected from C.sub.1-C.sub.4 alcohols, C.sub.3-C.sub.6 ketones, C.sub.3-C.sub.6 esters, C.sub.4-C.sub.8 ethers, and mixtures thereof. The one or more volatile organic solvents are present in an amount at least 60% by weight of the ink composition. The ink composition includes one or more binder resins present in an amount from 1% to 10% by weight of the ink composition, and one or more dyes. If water is present, it is present in amount less than 5% by weight of the ink composition. The ink composition includes less than 2% by weight of any humectant and/or wetting agent with a relative evaporation rate less than 0.3. The ink composition is suitable for use in a thermal ink jet printer.

A dye ink composition includes: a compound A represented by the general formula (I-1-1) or (I-1-2) as defined herein; a compound B represented by the general formula (1-2-1) or (I-2-2) as defined herein; at least one of a compound C-I represented by the general formula (I-3-1-1) or (I-3-1-2) as defined herein or a compound C-II represented by the general formula (I-3-2-1) or (I-3-2-2) as defined herein; a compound D represented by the general formula (I-4-1) or (I-4-2) as defined herein; and water, in which, as defined herein, a ratio of W.sub.1 to W.sub.A1 is 6.0% to 35.0% by mass, a ratio of W.sub.2 to W.sub.A1 is 20.0% to 45.0% by mass, a ratio of W.sub.3 to W.sub.A1 is 15.0% to 45.0% by mass, and a ratio of W.sub.4 to W.sub.A1 is 1.0% to 30.0% by mass.

A dye ink composition includes: a compound A represented by the general formula (I-1-1) or (I-1-2) as defined herein; a compound B represented by the general formula (1-2-1) or (I-2-2) as defined herein; at least one of a compound C-I represented by the general formula (I-3-1-1) or (I-3-1-2) as defined herein or a compound C-II represented by the general formula (I-3-2-1) or (I-3-2-2) as defined herein; a compound D represented by the general formula (I-4-1) or (I-4-2) as defined herein; and water, in which, as defined herein, a ratio of W.sub.1 to W.sub.A1 is 6.0% to 35.0% by mass, a ratio of W.sub.2 to W.sub.A1 is 20.0% to 45.0% by mass, a ratio of W.sub.3 to W.sub.A1 is 15.0% to 45.0% by mass, and a ratio of W.sub.4 to W.sub.A1 is 1.0% to 30.0% by mass.

An example of an inkjet composition includes a colorant, a density modifier selected from the group consisting of a triiodo amino derivative of isophthalic acid, a mixture of polysucrose and sodium diatrizoate, colloidal silica particles coated with polyvinylpyrrolidone, and combinations thereof; and an aqueous vehicle. The inkjet composition may be inkjet printed on a substrate, using a thermal or piezoelectric printer.

A fluorescent composition for the securement of a product, and the method for the securement of a product, which includes the step of preparing the fluorescent composition and a securement step by applying the fluorescent composition to at least a portion of the product. The fluorescent composition includes a polymer matrix incorporating at least a compound having formula I:

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