PHOTOCATALYTIC MEMBER

摘要

A photocatalytic member including a titanium-based oxide film disposed on one of the major surfaces of a transparent substrate, the titanium-based oxide film having a photocatalytic function and a physical thickness of 50 to 500 nm; and a primer film interposed between the transparent substrate and the titanium-based oxide film, the primer film being composed of two layers and having a total physical thickness of 40 to 200 nm, the layer of the primer film adjoining the transparent substrate having at least a function of blocking the gas and impurities which are discharged or eluted from the transparent substrate, and the layer of the primer film adjoining the titanium-based oxide having a larger refractive index than that of the layer adjoining the transparent substrate; in which the primer film reduces the dependence of the color on the thickness of the titanium-based oxide film, and the color of reflected visible light and the color of transmitted visible light of one of the major surfaces of the transparent substrate, when observed at least in one direction, have chromaticness indices a* and b* in the L*a*b* color system in the range indicated as within +/-5.