| 摘要 |
<p>The average light transmissivity of a wavelength range of 300 through 390nm of upper-layer coating films 3, 4 is less than 0.5% and the average light transmissivity of a wavelength range of 390 through 450nm of those is 6.5% or less. Or, the average light transmissivity of the wavelength range of 300 through 390nm of the upper-layer coating films 3, 4 is 0.5% or more and the average light transmissivity of the wavelength range of 390 through 450nm of those is 4.5% or less. Accordingly, the deterioration resistance against lights can be improved without forming any second coating film in a multi-layer coating film structure comprising the upper-layer coating films 3, 4 formed on a lower-layer coating film 2 formed by an electrocoating or the like.</p> |
