A dispersion liquid includes water, a coloring material, and a dispersion resin that disperses the coloring material. The dispersion resin has a constituent unit A containing a hydrophobic monomer, a constituent unit B containing a hydrophilic acrylic acid monomer, and a constituent unit C containing a hydrophilic vinyl monomer having a sulfonate group, and the weight-average molecular weight of the dispersion resin is 10,000 to 100,000. The content of the constituent unit A is 60 mol % or more relative to the total amount of the dispersion resin.

A dispersion liquid includes water, a coloring material, and a dispersion resin that disperses the coloring material. The dispersion resin has a constituent unit A containing a hydrophobic monomer, a constituent unit B containing a hydrophilic acrylic acid monomer, and a constituent unit C containing a hydrophilic vinyl monomer having a sulfonate group, and the weight-average molecular weight of the dispersion resin is 10,000 to 100,000. The content of the constituent unit A is 60 mol % or more relative to the total amount of the dispersion resin.

Printed delivery devices are disclosed herein. The printed delivery devices may include a layer formed from a water-soluble, printable composition. The water-soluble, printable composition may include purified water, pullulan, and vegetable glycerin. The printed delivery device may also include a support substrate made from polyester and/or polyolefin. The first layer may be printed on the support substrate.

Printed delivery devices are disclosed herein. The printed delivery devices may include a layer formed from a water-soluble, printable composition. The water-soluble, printable composition may include purified water, pullulan, and vegetable glycerin. The printed delivery device may also include a support substrate made from polyester and/or polyolefin. The first layer may be printed on the support substrate.

An ink for manufacturing a display device includes a solvent; and light emitting elements disposed in the solvent, wherein the light emitting elements include a first semiconductor layer including a first type of semiconductor and a second semiconductor layer including a second type of semiconductor, and an electrical conductivity of the ink is about 1.5 μS/m or less. Also provided are a method of manufacturing a display device using the ink and a display device manufactured by the method.

An ink for manufacturing a display device includes a solvent; and light emitting elements disposed in the solvent, wherein the light emitting elements include a first semiconductor layer including a first type of semiconductor and a second semiconductor layer including a second type of semiconductor, and an electrical conductivity of the ink is about 1.5 μS/m or less. Also provided are a method of manufacturing a display device using the ink and a display device manufactured by the method.

An ink set includes a process color ink set including a yellow ink, a magenta ink, a cyan ink, and a black ink as process color inks, and a light ink having a color similar to a corresponding one of the process color inks in the process color ink set. The yellow ink has a maximum absorption wavelength in a range from 350 nm to 480 nm, the magenta ink has a maximum absorption wavelength in a range from 510 nm to 560 nm, the cyan ink has a maximum absorption wavelength in a range from 580 nm to 700 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the yellow ink is in a range from 85 nm to 100 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the magenta ink is in a range from 85 nm to 100 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the cyan ink is in a range from 118 nm to 165 nm. A maximum absorbance in a visible light wavelength range of the light ink is 70% or less of a maximum absorbance in the visible light wavelength range of the corresponding one of the process color inks.

An ink set includes a process color ink set including a yellow ink, a magenta ink, a cyan ink, and a black ink as process color inks, and a light ink having a color similar to a corresponding one of the process color inks in the process color ink set. The yellow ink has a maximum absorption wavelength in a range from 350 nm to 480 nm, the magenta ink has a maximum absorption wavelength in a range from 510 nm to 560 nm, the cyan ink has a maximum absorption wavelength in a range from 580 nm to 700 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the yellow ink is in a range from 85 nm to 100 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the magenta ink is in a range from 85 nm to 100 nm, a full width at half maximum of a peak including the maximum absorption wavelength of the cyan ink is in a range from 118 nm to 165 nm. A maximum absorbance in a visible light wavelength range of the light ink is 70% or less of a maximum absorbance in the visible light wavelength range of the corresponding one of the process color inks.

An ink accommodating body accommodating an ink composition is provided, in which the ink composition contains water and a first dye that is a compound represented by Formula (B-1) or a salt thereof, a content of the first dye in the ink composition is 0.5% by mass or more with respect to a total amount of the ink composition, and a value of a ratio (A/V) is 1.7 or less where a total surface area of a metal, of the ink accommodating body, in contact with the ink composition is A (cm.sup.2) and an accommodation capacity for the ink composition accommodated in the ink accommodating body is V (cm.sup.3).

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An ink accommodating body accommodating an ink composition is provided, in which the ink composition contains water and a first dye that is a compound represented by Formula (B-1) or a salt thereof, a content of the first dye in the ink composition is 0.5% by mass or more with respect to a total amount of the ink composition, and a value of a ratio (A/V) is 1.7 or less where a total surface area of a metal, of the ink accommodating body, in contact with the ink composition is A (cm.sup.2) and an accommodation capacity for the ink composition accommodated in the ink accommodating body is V (cm.sup.3).

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