Method for forming conductive thin wire, method for producing transparent conductor, method for producing device, and set of conductive ink and base material

A set of a conductive ink and a base material, wherein

• the conductive ink contains at least a main solvent having a boiling point equal to or lower than a boiling point of water, a solvent having a boiling point higher than that of water, and a conductive material,
• the base material has surface energy of less than 40 mN/m,
• conditions of 30°≤θ1≤70°, 0°≤θ2≤40°, and θ2<θ1 are satisfied when a forward contact angle of the conductive ink to the base material is represented by θ1, and a backward contact angle of the conductive ink to the base material is represented by θ2, and
• the set of the conductive ink and the base material is used for forming a conductive thin wire on the base material by an inkjet method using the conductive ink,
• wherein the base material has an undercoat layer containing at least a resin containing a hydrophobic acrylic resin skeleton.