LIGHT-ACCUMULATING DISPLAY BOARD

摘要

PROBLEM TO BE SOLVED: To provide a light-accumulating display board excellent in weatherability and durability and also in visibility in the case of emitting light at night. SOLUTION: This light-accumulating display board is provided with a transparent plate-like member 1, a layer 2 containing a light-accumulating base stock in the rear of the member 1 and a layer 3 containing a reflecting base stock in the rear of the layer 2.