The characteristics of the fluorescent material.

The characteristics of the fluorescent material.

The scintillator layer (38) contains a fluorescent material (I), the partition layer contains a second phosphor (P2) having optical characteristics different from those of the fluorescent material (IP1).

The fluorescent material contains a yellow fluorescent material and a red fluorescent material.

The relevant characteristics of packaging material

Adsorption of water by the surface of a blue fluorescent material is suppressed to improve degradation inluminance, change in chromaticity or discharge characteristic of the fluorescent material.

Adsorption of water by the surface of a blue fluorescent material is suppressed, and degradation in luminance, change in chromaticity or discharge characteristic of the fluorescent material is improved.

The characteristics of the retro-reflective material or devices.

The first ink composition includes a first luminescent phosphor and the second ink composition includes a second luminescent phosphor that is different from the first luminescent phosphor.

The (S1) energy of the host material is higher than the (S1) energy of the fluorescent dopant material, the difference between the (S1) energy of the host material and the (S1) energy of the fluorescent dopant material being 0.5 eV or less.

Also provided are a process for producing the fluorescent material and an illuminator including the blue fluorescent material.

Characteristics of the Absorbing Material B

CHARACTERISTICS OF THE ABSORBING MATERIAL A

Characteristics of the absorbing material B

CHARACTERISTICS OF THE ABSORBING MATERIAL B