tja, da mantis Frage aus dem geschl. thread hier immer noch unbeantwortet is..
providing a test solution containing iodine and hydrogen peroxide.
in der Tinktur (Teststift), laut US Patent :
United States Patent 5,063,163
Carmeli November 5, 1991
Method of detecting counterfeit paper currency
A method of detecting counterfeit paper currency includes applying a test solution having an initial color to an area of a paper currency to be tested. After waiting for a predetermined time period, the color of the test area is compared with a predetermined standard to determine if a reaction has taken place, whereby on the application of the test solution to a counterfeit paper currency the net result will be a color change from its initial color to a black coloration and for a genuine paper currency there will be no immediate change in its initial color.
Kraft wird aus dem Zwang geboren und stirbt an der Freiheit.