摘要:
An ultraviolet irradiation apparatus for curing an ultraviolet curable coating agent applied to a substrate, by irradiating an ultraviolet light to the ultraviolet curable coating agent, which includes a low-pressure mercury lamp as a light source. According to the present invention, the problems associated with the use of an ultraviolet irradiation apparatus, whose light source is a high-pressure mercury lamp, can be solved, such as the need of a high voltage power source, degradation of quality, potential hazard to operators and the like. The present invention also provides a method of forming a cured coating film having the same properties as achieved by the use of a high-pressure mercury lamp, such as resistance to stain, adhesion to substrate and the like. This method requires a shorter time for curing of a unit area of the film as compared to the use of a high-pressure mercury lamp (100 V type). Accordingly, the present invention is particularly useful for floor surfaces of gymnasiums, classrooms, department stores, offices, stores, showrooms and the like.