Aqueous ink, ink ejection device, image recording device, and printing method

An aqueous ink, comprising:

• water;
• a solvent group A having a vapor pressure of 0.07 Pa or more at 25° C.;
• a thickener;
• and
• a binder polymer,
• wherein:
• the solvent group A is present in the aqueous ink in a weight percent of 31.0 wt % to 55.0 wt % with respect to a total amount of the aqueous ink,
• the thickener is present in the aqueous ink in a weight percent of 13.0 wt % or less with respect to the total amount of the aqueous ink,
• the thickener includes a high viscosity binder polymer dispersion liquid in which the binder polymer is dispersed,
• the high viscosity binder polymer dispersion liquid has a viscosity of 100 mPa·s or more and less than 5000 mPa·s at 25° C. when being added to a high viscosity binder polymer dispersion medium such that the binder polymer is present in the high viscosity binder polymer dispersion liquid at 38.0 wt %,
• the binder polymer is present in the aqueous ink in a weight percent of 4.2 wt % or less with respect to the total amount of the aqueous ink,
• the binder polymer is an acrylic polymer,
• the aqueous ink has a viscosity of 10 mPa·s to 14 mPa·s at 25° C., and
• an evaporation rate is 70% or more when 5 g of the aqueous ink is placed in an upwardly opened container having a diameter of 60 mm and heated at 100° C. for 4 hours indoors at a room temperature of 25° C. and a humidity of 65%.