DEFECT IDENTIFICATION METHOD AND DEFECT IDENTIFICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a defect identification method and a defect identification system, capable of surely identifying a defective part of a coating film with high accuracy even if concentration of a fluorescent agent in coating liquid is reduced, at low cost.SOLUTION: While transporting a web W having a coating film CF containing a fluorescent agent, in a defect identification method for identifying a defective part during coating, the coating film is irradiated with ultraviolet light so as to straddle the web in the width direction, fluorescent light from an irradiation region IR of the ultraviolet light is detected and the detected ultraviolet light is analyzed to identify a defective part of the coating film.