Provided is a method for manufacturing an article that can detect a defect in an article in which a liquid-impregnated sheet is wrapped with an individual packaging sheet with high accuracy. A method for manufacturing an article 1 includes a packaging step, a sealing step of forming seal parts 5, 6 on an individual packaging sheet 3 wrapping the liquid-impregnated sheet 2 to form a continuous composite 1 a, and a cutting step of cutting the continuous composite 1 a, The inspection step includes a step of acquiring a near-infrared image, a step of creating a binary image, a step of calculating an area ratio of a portion detected by the binary processing with respect to the inspection region, And determining whether a defect exists in the article based on the area ratio, wherein the binary processing is performed using at least one of a threshold capable of distinguishing a...

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