abstract |
An inner wall material is provided that has a function of decomposing odors and dirt adhering to the surface without using ultraviolet irradiation means. When the color of a tungsten oxide photocatalyst powder is expressed in an L * a * b * color system on at least a part of a substrate surface, a * is −5 or less, b * is −5 or more, L * An inner wall material coated with a visible light responsive photocatalyst powder having a color of 50 or more. In addition, it is possible to decompose odors and dirt at night by installing a light source. A light emitting diode is preferable as the light source. [Selection] Figure 1 |