Nhk Spring Co., Ltd.

Masatake Ono

Hidekazu Hoshino

Itsuo Takeuchi

Tohru Ida

Mutsumi Sasaki

A breakable seal can be discriminated more easily than the conventional one. The discrimination mediumhas a cholesteric liquid crystal layer, a substrate layer, an adhesive layer, and a partial peeling layer. The discrimination mediumhas an adhesion strength Xbetween the adhesive layerand the partial peeling layer, an adhesion strength Xbetween the partial peeling layerand the cholesteric liquid crystal layer, and an adhesion strength Xbetween the cholesteric liquid crystal layerand the substrate layer. The relationships X&#x3c;Xand X&#x3c;Xare satisfied at areas, and. The relationships X&#x3c;Xand X&#x3c;Xare satisfied at areasand. In the above manner, when the discrimination mediumis peeled from the article, the discrimination mediumis separated into a discrimination mediumand a discrimination medium. For example, the above cholesteric liquid crystal layer is provided to a breakable seal, so that the breakable seal which allows confirmation of whether or not the discrimination medium is authentic before the breakable seal is broken and which allows confirmation of breakage of he breakable seal when the breakable seal is broken is provided.

Growing community of inventors

Yokohama, Japan

Masatake Ono