An object of the present invention is to provide a method for producing a laminate that is excellent in image quality of a printing layer and in desorption of the printing layer, suppresses reattachment of the desorbed components, and is suitable for plastic recycling, To provide a method for producing a molding material obtained by melting and kneading the recovered plastic base material, and to provide a method for producing a high-quality molded body obtained by heating and molding the molding material. A method for producing a laminate comprising at least a plastic substrate, a primer layer containing a structural unit derived from a curing agent, and a printing layer in this order, An aging step of aging the primer layer so that a residual rate of a peak derived from a curing agent measured by a Fourier transform infrared spectrophotometer (FT-IR) is 20 perent or less, and a printing...

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