Colored resin particle dispersion, ink, ink set, and inkjet printing method

A colored resin particle dispersion comprising:

• colored resin particles;
• and
• water,
• wherein the colored resin particles contain an oil-soluble dye and a polymer P containing a structural unit represented by Formula (1), a structural unit represented by Formula (2), and a hydrophilic group,
• in Formula (1),
• L1 represents a chain hydrocarbon group having 4 to 10 carbon atoms, and
• two *1's each represent a bonding position, and
• in Formula (2),
• L2 represents a chain hydrocarbon group having 2 to 25 carbon atoms which may contain an oxygen atom, a nitrogen atom, or a sulfur atom, or a polymer chain having a number-average molecular weight of 500 or greater which consists of a polyether chain, a polyester chain, a polycaprolactone chain, a polycarbonate chain, a polybutadiene chain, a polyisoprene chain, or a polyolefin chain,
• Y1 and Y2 each independently represent —O—, —S—, or, —NRz-,
• Rz represents a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and
• two *2's each represent a bonding position.