| 简介 |
FIELD : physics.
SUBSTANCE : security marking is made using inorganic luminescent compounds based on rare earth and alkali metals containing substituent elements. The protective marking, based on these compounds, has a Stokes and / or anti-Stokes luminescence in the wavelength range of 400-2500 nm, which arises under the influence of the exciting radiation lying in the spectral range of 700-1000 nm. Marking luminescence has the property to change its intensity without changing its spectral composition under the influence of the stimulating radiation in the spectral range of 300-700 nm. The protective marking is entered into the basis of the value document, or applied to its surface by printing.
EFFECT : high level of the product protection against counterfeit.
9 cl, 11 ex, 1 tbl |
客服热线：
手机版
二维码
