| 摘要 |
PROBLEM TO BE SOLVED: To obtain a photostimulable-phosphor-contg. gelatinous ink compsn. for writing utensils which contains a photostimulable phosphor excellent in light resistance and persistence characteristics and also in storage stability. SOLUTION: This compsn. comprises a photostimulable phosphor, a resin, and a solvent, subject to the conditions that the matrix crystal of the phosphor is a compd. represented by the formula: MAl2 O4 (wherein M is at least one kind of element selected from among calcium, strontium, and barium) and that the compsn. contains a gelling component. |
