| 摘要 |
PURPOSE:To easily confirm coating irregularity, by a method wherein a primer having a fluorescent substance dispersed therein is applied and the presence of the cold light emitted from the primer is subsequently detected by an ultraviolet ray sensor. CONSTITUTION:About 0.2-5wt% of a primer of a fluorescent substance is preliminarily dispersed in the primer. As the fluorescent substance, a fluorescent dye such as heterocyclic cumarine, oxazole or naphthalimide or fluorescent pigment colored with said dye is used. After this primer is applied to an object to be painted by a brush, the coated surface is traced by an ultraviolet sensor to detect the presence of the cold light emitted from the primer. When there is an area where no cold light is detected, it is judged that no primer has been applied to said area.
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