Black-film-forming mixed powder

A black-film-forming mixed powder which comprises (A) a zirconium nitride powder and (B) a titanium nitride powder or a titanium oxynitride powder, wherein a content ratio of (A) the zirconium nitride powder and (B) the titanium nitride powder or the titanium oxynitride powder is within a range of (90:10) to (25:75) in terms of mass ratio (A:B),

• the zirconium nitride powder has a peak corresponding to zirconium nitride in an X-ray diffraction profile, but does not have a peak corresponding to zirconium dioxide, a peak corresponding to a low-order oxide of zirconium or a peak corresponding to a low-order oxynitride of zirconium,
• in a spectrum of a dispersion in which the mixed powder is dispersed in a dispersing liquid with a concentration of 50 ppm, when a light transmittance at a wavelength of 400 nm is X, a light transmittance at a wavelength of 550 nm is Y, and a light transmittance at a wavelength of 1,000 nm is Z, X>10%, Y<10%, Z<16%, X/Y is 1.25 or more and Z/Y is 2.0 or less;
• wherein a black film formed by the black-film-forming mixed powder exhibits a greater light shielding property at a wavelength of 500 nm to 1,100 nm than when the mass ratio (A:B) is outside of the range of (90:10) to (25:75), and/or wherein a black film formed by the black-film-forming mixed powder exhibits greater light transmittance at a wavelength of 365 nm to 410 nm than when the mass ratio (A:B) is outside of the range of (9:10) to (25:75).