| 摘要 |
A security product comprising a pouch containing a composition, the composition comprising a mixture of a liquid, a polymer, a light-emitting material and a plurality of marker materials. Ideally the composition is a gel. The polymer may be an anionic acrylate copolymer and the liquid may be water, alcohols or esters. The marker material may comprise a unique composition of alkali earth metals, d-block metals, lanthanides and p-block metals. The light-emitting material may be fluorescent or phosphorescent. The composition may further comprise an adhesive such as a polyacrylate, polyacetate and polystyrene. The pouch 20 may form part of a blocking device 10 blocking an access passage that to a restricted area, such as a manhole 30, and the composition may be transferred onto an object or individual coming into contact with the composition if the pouch is ruptured or pierced. |
