| 摘要 |
<p>The invention relates to a valuable document such as bonds, identification cards or the like, having at least one characteristic of authenticity in the form of a luminescent substance. The luminescent substance has particles consisting of a molecular sieve charged with colorant, the structure of said sieve forming an optical resonator. At least one colorant can be excited for stimulated emission in said resonator, wherein the colorant is inserted in t he cavities of the molecular sieve or is located in the inner and outer surface s of the molecular sieve and transition to stimulated emission is accompanied by a detectable change in the luminescence properties of the colorant.</p> |
