LUMINESCENT SHEET AND FORGERY PREVENTION MEDIUM
摘要:
[Problem] To provide a luminescent sheet having an excellent light emission performance and capable of preventing forgery.[Solution] A luminescent sheet 1 has a first base material layer, at least one of recesses 3 and projections 4 having edges and formed on a first base material layer 2, and stress-luminescent parts each arranged at a location contacting with the edge. At least a part of the edges has a stress concentrated part where stress concentrates when stress is added to the first base material layer in a predetermined direction. The stress-luminescent part emits light having a predetermined wavelength with a light-emitting intensity depending on external load stress added to the stress concentrated part.
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