| abstract |
(57) [Problem] To easily and quickly evaluate the performance of a coating film such as water resistance, moisture resistance, retort resistance, weather resistance, low molecular absorption or low molecular adsorption, and solvent resistance. The present invention provides a method for evaluating the performance of a coating film which can be performed. SOLUTION: After contacting a coating film with a solution or dispersion of a substantially non-volatile conjugated compound, the absorption characteristic or the fluorescence intensity in a certain wavelength region of the coating film surface is measured. Evaluation methods. |