VALUABLE DOCUMENT WITH COUNTERFEIT PROTECTION AND METHOD FOR DETECTION OF ITS AUTHENTICITY Russian patent published in 2010 - IPC B42D15/10 B41M3/14 C09K11/77 

FIELD: printing industry.

SUBSTANCE: valuable document has marking, which contains luminescent compound that has both anti-stokes and Stocks law luminescence, with composition of Ln _1-X-Y-Z Yb_X Er_Y Ce_Z Me^I _C Me^VI _D P_I-D O_4+D/2-C where: Me^I - Li or Na, Me^VI - W or Mo, Ln - Y, La, Gd, 0.1 ≤ x ≤ 0.9; 0.005 ≤ y ≤ 0.2; 0.0001 ≤ z ≤ 0.01; 0.001 ≤ c ≤ 0.1; 0.001 ≤ d ≤ 0.1; or compound of the following composition: Ln _2-X-Y-Z Yb_X Er_Y Ce_Z O₂ S, where Ln - Y, La, Gd, 0 <x ≤ 0.2; 0.1 ≤ y ≤ 0.4; 0.0001 ≤ z ≤ 0.005; or compound of the following composition: Ln _2-X-Y-Z Er_Y Ce_Z O₂ S; where Ln - Y, La, Gd, 0 < x ≤ 0.2; 0.1 ≤ y ≤ 0.4; 0.0001 ≤ z ≤ 0.005. Marking may be made by printing method, for instance offset method of printing. Method for identification of valuable document authenticity with all above mentioned criteria inherent in it includes detection of hidden protective marking on a valuable document by measurement and further analysis of dependency extent of stokes and anti-stokes luminescence strip intensity on density of excitation radiation capacity.

EFFECT: improved level of valuable document protection.

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