In the three-mouth bottle equipped with a stirrer, a thermometer, a reflux condenser and a dropping funnel, add epoxy resin and butanediol-ethyl acetate solvent, mix evenly, heat to the reflux temperature, dissolve the initiator benzoyl peroxide in the monomer acrylic acid and propylene ester mixture where the polymerization inhibitor has been removed, transfer to the dropping funnel, gradually drip into the three-mouth bottle at the reflux temperature, drip within 2 hours, and, an initiator is added every 1h to completely polymerize, cool and discharge the material, stir and disperse the freshly dried cuprous iodide (accounting for 76%-79% of the total paint) and 9%-10% of the mass of acrylic acid and methyl methacrylate copolymer, stir and disperse evenly, then add curing agent butyl ether melamine 4% and anti-settling agent 80% and stir evenly, transfer to a ball mill, and perform ball milling for 8h. The prepared paint is coated on a 70 μm thick polyester film, and then placed in a 120 ℃ oven to cure for 3 min, taken out and cooled to room temperature.