DEFECT DETECTION METHOD, DEFECT DETECTION TEST PIECE, AND DEFECT DETECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a defect detection method, a defect detection test piece, and a defect detection device that can safely and conveniently detect a defect of a transparent gas barrier film.SOLUTION: A moisture absorbent 17 which changes in color by contacting water is brought into contact with one surface of a transparent gas barrier film 15 having a barrier layer 13, and a defect of the transparent gas barrier film 15 is detected on the basis of the color of the moisture absorbent 17 having changed by the water passing through the defect of the transparent gas barrier film 15 to contact the moisture absorbent 17. If the barrier layer 13 of the transparent barrier film 15 has a defect such as a crack or pinhole, water (steam) passes through the defect to contact the moisture absorbent 17, which thereby changes in color. Consequently, the position of the defect can be confirmed by confirming the change in color of the moisture absorbent 17.