Provided are a colored resin particle dispersion containing water and colored resin particles containing a polymer P containing a hydrophilic group and an oil-soluble dye, in which the oil-soluble dye includes an oil-soluble dye (D) obtained by modifying a water-soluble reactive dye with an alkyl group having 4 or more carbon atoms, or exchanging a counter cation in an acid dye with an organic cation containing an alkyl group having 4 or more carbon atoms, an ink, an ink set, an ink jet textile printing method, and a printed textile product.

Provided are a textile printing pretreatment liquid including water and an onium salt compound represented by Formula (A) or Formula (B), a textile printing ink set, and an ink jet textile printing method. R.sup.A1 to R.sup.A4 and R.sup.B1 to R.sup.B6 each represent a hydrocarbon group that may include at least one of an aromatic ring, a hetero ring, —O—, —C(═O)O—, or a substituent. At least one of R.sup.A1 to R.sup.A4 and at least one of R.sup.B1 to R.sup.B6 include at least one of —O—, —C(═O)O—, —OH, or an allyl group and may include a substituent. X.sup.+ represents N.sup.+ or P.sup.+. Y.sup.− represents a counter anion. L represents a divalent linking group.

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Provided are a textile printing pretreatment liquid including water and an onium salt compound represented by Formula (A) or Formula (B), a textile printing ink set, and an ink jet textile printing method. R.sup.A1 to R.sup.A4 and R.sup.B1 to R.sup.B6 each represent a hydrocarbon group that may include at least one of an aromatic ring, a hetero ring, —O—, —C(═O)O—, or a substituent. At least one of R.sup.A1 to R.sup.A4 and at least one of R.sup.B1 to R.sup.B6 include at least one of —O—, —C(═O)O—, —OH, or an allyl group and may include a substituent. X.sup.+ represents N.sup.+ or P.sup.+. Y.sup.− represents a counter anion. L represents a divalent linking group.

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A surface tension difference between a first ink and a third ink is smaller than a surface tension difference between the first ink and a second ink. A first gradation value for the first ink is quantized to generate a first quantized value, a second gradation value for the second ink is quantized to generate a second quantized value, and a third gradation value for the third ink is quantized to generate a third quantized value. The above quantization processing is performed such that, in a predetermined pixel region, the number of pixels for each of which the second quantized value and the third quantized value both indicate printing is greater than the number of pixels for each of which the first quantized value and the third quantized value both indicate printing.

A surface tension difference between a first ink and a third ink is smaller than a surface tension difference between the first ink and a second ink. A first gradation value for the first ink is quantized to generate a first quantized value, a second gradation value for the second ink is quantized to generate a second quantized value, and a third gradation value for the third ink is quantized to generate a third quantized value. The above quantization processing is performed such that, in a predetermined pixel region, the number of pixels for each of which the second quantized value and the third quantized value both indicate printing is greater than the number of pixels for each of which the first quantized value and the third quantized value both indicate printing.

Build materials for 3D printing applications are described herein which, in some embodiments, comprise a dye component operable to alter spectral characteristics of the printed part over the course of the build cycle. In some embodiments, for example, the dye component can provide desirable light penetration depth during article printing and sufficient optical clarity during final light curing processes.

Provided is an ink jet recording method that enables recording of an image with a wide expressible color gamut and high fluorescence intensity. The ink jet recording method comprises a step of recording an image by applying first and second inks to a recording medium by using an ink jet recording apparatus, including a recording head having ejection orifices configured to eject the first and second inks, respectively, such that an area where the first ink is applied and an area where the second ink is applied at least partially overlap each other. The first ink contains an alkaline buffer and a pigment particle dispersed by an effect of an anionic group, the second ink contains a fluorescent particle dispersed by an effect of an anionic group, and a density ρ.sub.1 (g/cm.sup.3) of the pigment particle is more than a density ρ.sub.2 (g/cm.sup.3) of the fluorescent particle.

A printing apparatus comprises a determination unit configured to, in a case where fluorescent ink is used in printing of an image, determine an order of printing by the fluorescent ink and printing by the light emission suppressing ink that suppresses light emission of the fluorescent ink, in the plurality of scans. The determination unit determines the order of the printing by the fluorescent ink and the printing by the light emission suppressing ink such that the fluorescent ink is printed to be in a layer lower than the light emission suppressing ink in a region of a dark portion of the image.

An ink jet ink composition of the present disclosure includes a coloring material, water, an acetylene glycol-based surfactant having a HLB value of 4 or less, and 1-(2-hydroxyethyl)-2-pyrrolidone. The content of 1-(2-hydroxyethyl)-2-pyrrolidone in the ink jet ink composition is 0.5% by mass or more and 5.0% by mass or less.

An ink jet ink composition of the present disclosure includes a coloring material, water, an acetylene glycol-based surfactant having a HLB value of 4 or less, and 1-(2-hydroxyethyl)-2-pyrrolidone. The content of 1-(2-hydroxyethyl)-2-pyrrolidone in the ink jet ink composition is 0.5% by mass or more and 5.0% by mass or less.