Infrared light-reflecting film and production method thereof

A method of producing an infrared light-reflecting film, comprising:

• a coating step of coating a polymerizable liquid crystal composition including a polymerizable cholesteric liquid crystal compound (A), a chiral agent having an HTP represented by the following Expression (1) of 50 μm−1 or less (B), a monofunctional monomer (C), and an organic solvent (D) on a substrate,
• an alignment step of aligning the polymerizable cholesteric liquid crystal compound by heating to form a cholesteric liquid crystal phase, and
• an irradiation step of irradiating the polymerizable liquid crystal composition with actinic radiation to fix the cholesteric liquid crystal phase and form an infrared light-reflecting layer, wherein the amount of a residual solvent after the alignment step is controlled to 0.20 g/m2 or more,
• HTP=Refractive Index of Polymerizable Cholesteric Liquid Crystal Compound/{Selective Reflection Wavelength (unit:
• μm) of Cholesteric Liquid Crystal Phase×Mass ratio of Chiral Agent to Polymerizable Cholesteric Liquid Crystal Compound}. Expression (1)