| abstract |
The present invention relates to a polyvinyl acetal resin film, comprising a polyvinyl acetal resin material,whereinat least one surface has a relative diffuse reflectance of 3% or higher at a wavelength of 550 nm,an absolute difference between the relative diffuse reflectance of one surface at a wavelength of 550 nm and that of the other surface at a wavelength of 550 nm is 0.5% or larger, andthe amount of a plasticizer in the polyvinyl acetal resin film is 0 to 20% by mass based on a total mass of the polyvinyl acetal resin film. |