An example of a dye discharge fluid includes a water-soluble organic solvent, a heat activated reducing agent, and water. A pH of the dye discharge fluid is less than 7. The dye discharge fluid may be used with a colored pigmented inkjet ink, a white pigmented inkjet ink, and/or a colored textile fabric, and may be included in a fluid set and/or a printing kit.

Examples of the present disclosure are directed toward an ink composition including a surfactant. An example ink composition consistent with the present disclosure includes a dye colorant dispersion, a solvent, a chelating agent, an oleth-3-phosphate, and a surfactant including a modified fatty alcohol polyglycol ether. In various examples, the dye colorant dispersion is present in an amount ranging from about 1.0 wt % to about 7.0 wt % based on a total weight of the ink, and the solvent is present in an amount ranging from about 10 wt % to about 22 wt % based on the total weight of the ink. The chelating agent may be present in an amount ranging from about 0.05 wt % to about 0.2 wt % based on the total weight of the ink, and the oleth-3-phosphate is in an amount ranging from about 0.1 wt % to about 0.3 wt % based on the total weight of the ink.

Examples of the present disclosure are directed toward an ink composition including a surfactant. An example ink composition consistent with the present disclosure includes a dye colorant dispersion, a solvent, a chelating agent, an oleth-3-phosphate, and a surfactant including a modified fatty alcohol polyglycol ether. In various examples, the dye colorant dispersion is present in an amount ranging from about 1.0 wt % to about 7.0 wt % based on a total weight of the ink, and the solvent is present in an amount ranging from about 10 wt % to about 22 wt % based on the total weight of the ink. The chelating agent may be present in an amount ranging from about 0.05 wt % to about 0.2 wt % based on the total weight of the ink, and the oleth-3-phosphate is in an amount ranging from about 0.1 wt % to about 0.3 wt % based on the total weight of the ink.

Provided is an ink jet recording method by which even when an ink jet recording apparatus having a small size and high durability is used, excellent sticking recoverability is obtained and a high-quality image suppressed from causing unevenness can be recorded. The ink jet recording method includes recording an image with an ink jet recording apparatus including: a plurality of aqueous inks; a first ink storage portion; a second ink storage portion; a plurality of tubes; a recording head; and a recovery mechanism. The ratio (η.sub.2/η.sub.1) of the viscosity 112 (mPa.Math.s) of the second ink to the viscosity η.sub.1 (mPa.Math.s) of the first ink is 0.7 or more to 1.5 or less, and the first ink contains a first water-soluble organic solvent having a specific dielectric constant of 40.0 or more.

Provided is an ink jet recording method by which even when an ink jet recording apparatus having a small size and high durability is used, excellent sticking recoverability is obtained and a high-quality image suppressed from causing unevenness can be recorded. The ink jet recording method includes recording an image with an ink jet recording apparatus including: a plurality of aqueous inks; a first ink storage portion; a second ink storage portion; a plurality of tubes; a recording head; and a recovery mechanism. The ratio (η.sub.2/η.sub.1) of the viscosity 112 (mPa.Math.s) of the second ink to the viscosity η.sub.1 (mPa.Math.s) of the first ink is 0.7 or more to 1.5 or less, and the first ink contains a first water-soluble organic solvent having a specific dielectric constant of 40.0 or more.

A dispersion liquid includes water, a coloring material, a dispersion resin that disperses the coloring material, and a compound having s sulfonate group and a polymerizable group. The dispersion resin has a constituent unit A containing a hydrophobic monomer and a constituent unit B containing a monomer having a sulfonate group. The weight-average molecular weight of the dispersion resin is 5,000 to 100,000, and the molecular weight of the compound is 300 or less.

The present invention relates to a medical wristband with invisible information and a method for manufacturing the same. The conventional developed dyes or inks in the prior art can store information which, however, is visible. In the present invention, polystyrene (PS) microspheres are prepared by micro-emulsification: PS particles are dissolved in a toluene solution and a fluorescent dye is added to obtain a fluorescent solution; an SDS solution is added in and mixed with the fluorescent solution to obtain a system to be ultrasonically emulsified; and the system is ultrasonically emulsified and the toluene is completely volatilized. The ink can be used directly as an invisible ink. The information is written, as two-dimensional codes and by the ink, on a piece of non-fluorescent paper, and plastic-packaged onto a wristband of a patient. Information about a patient can be successfully scanned in the ease of UV on.

The present invention relates to a medical wristband with invisible information and a method for manufacturing the same. The conventional developed dyes or inks in the prior art can store information which, however, is visible. In the present invention, polystyrene (PS) microspheres are prepared by micro-emulsification: PS particles are dissolved in a toluene solution and a fluorescent dye is added to obtain a fluorescent solution; an SDS solution is added in and mixed with the fluorescent solution to obtain a system to be ultrasonically emulsified; and the system is ultrasonically emulsified and the toluene is completely volatilized. The ink can be used directly as an invisible ink. The information is written, as two-dimensional codes and by the ink, on a piece of non-fluorescent paper, and plastic-packaged onto a wristband of a patient. Information about a patient can be successfully scanned in the ease of UV on.

Provided are a textile printing ink set including a pretreatment liquid including a quaternary ammonium cation having a molecular weight of 3000 or less, and an ink composition including a water-insoluble dye, a dispersing agent, and water, wherein a content of the quaternary ammonium cation relative to a total amount of the pretreatment liquid is 5 mass % to 20 mass %; and a textile printing method.

Provided are a textile printing ink set including a pretreatment liquid including a quaternary ammonium cation having a molecular weight of 3000 or less, and an ink composition including a water-insoluble dye, a dispersing agent, and water, wherein a content of the quaternary ammonium cation relative to a total amount of the pretreatment liquid is 5 mass % to 20 mass %; and a textile printing method.