Pretreatment liquid, ink set, base material for image recording, method of producing base material for image recording, image recording material, and image recording method

A pretreatment liquid to be used for a pretreatment that is performed on an impermeable base material before an image is recorded on the impermeable base material, the pretreatment liquid comprising:

• a resin;
• and
• an aqueous medium,
• wherein the resin has at least one selected from the group consisting of a structural unit (1), and a structural unit (2),
• a glass transition temperature of the resin is in a range of −10° C. to 50° C., and
• a content of a structural unit derived from an alkyl (meth) acrylate containing a chain alkyl group having 2 or more carbon atoms in the resin is less than 5% by mass with respect to an entirety of the resin,
• in the structural unit (1), and the structural unit (2), R2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
• in the structural unit (1),
• A2 represents —NH— or —N(L4-Y4)—,
• L2 represents a divalent group which is one selected from the first group consisting of an alkylene group, an alkenylene group, an alkynylene group, an arylene group, —O—, —NH—, —N(L4-Y4)—, and —C(═O)—, a divalent group which is obtained by combining two or more selected from the first group, or a single bond,
• Y2 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a halogen atom, —OH, —OR3, —NH2, —NR3H, or —C(═O)R3, and
• two of A2, L2, and Y2 may be linked to each other to form a ring,
• in the structural unit (2),
• L3 represents a divalent group which is one selected from the first group or a divalent group which is obtained by combining two or more selected from the first group,
• Y3 represents a halogen atom, —OH, —NH2, —NR3H, or —C(═O)R3, and
• L3 and Y3 may be linked to each other to form a ring,
• in the structural unit (1) and the structural unit (2),
• L4 represents a divalent group which is one selected from the second group consisting of an alkylene group, an alkenylene group, an alkynylene group, an arylene group, —O—, —NH—, and —C(═O)—, a divalent group which is obtained by combining two or more selected from the second group, or a single bond,
• Y4 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a halogen atom, —OH, —OR3, —NH2, —NR3H, —NR3R4, or —C(═O)R3, and
• R3 and R4 each independently represent an alkyl group, an alkenyl group, an alkynyl group, or an aryl group, and
• in the structural unit (1) and the structural unit (2),
• L4 and Y4 in —N(L4-Y4)— may be linked to each other to form a ring, and
• R3 and R4 in —NR3R4 may be linked to each other to form a ring.