CHEMICAL SOLUTION TO DETECT THE COUNTERFEIT OF PAPER CURRENCY

摘要

This invention relates to a solution for detecting the counterfeit of paper currency. The solution contains iodine at concentration from 0.005 to 3 grams/litre and the solution solvents can be: alcohols, ketones, polyalcohols, esters, ethers, a mixture of solvents belonging to the same chemical class or to several classes of the above solvents. The solvent or the solvent mixture, if they are miscible with water, contain distilled water in the ratio from 99:1 to 1:99 by volume; in all other cases the organic solvent or the solvent mixture is saturated with distilled water at the temperature of 20 °C. The prepared chemical solution, contained inside ball-pens, or fountain-pen or felt pens or other possible dispensers, is used for countersigning the paper currency. In a counterfeit case, the line on the paper currency turns, in about one minute, one of the following colours: lilac, violet lilac, violet deep blue, havana yellow. In case of a genuine paper currency, the drawn line of solution doesn't change its colour and disappears completely from the countersigned currency.