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This method covers the determination of the resistance of paint films, coating systems, and related products to high humidity conditions, as specified in the coating or product specifications. This method can be applied to coatings on both porous substrates, such as wood, plaster, and drywall, as well as non-porous substrates, such as metal. The TS EN ISO 6270-2 and ASTM D2247 methods provide an indication of performance under conditions where continuous condensation forms on the surface. This test defines the conditions and procedures to be followed when testing coated test specimens in environments with either constant or fluctuating condensation. At the end of the moisture exposure test, the coated specimens are examined for any degradation in the coating (such as blistering, staining, softening, wrinkling, and becoming brittle) and any degradation in the substrate material. Panels or finished products can be tested using both methods.
