Patent ID: 8162467

Claim:
A method for unique marking of material, said method comprising the steps: a) providing an ink for marking a product to be rendered unique, said ink comprising a vehicle suitable for printing, and microparticles mixed with said vehicle so as to be distributed randomly, said microparticles each having a diameter substantially 25 μm to 80 μm; b) printing a sign on said product using said ink by applying said ink to said product using at least one roller, said sign being substantially at least one centimeter square, said sign comprising a progressive filing number for storage in a central database, wherein said roller breaks up said microparticles, randomly distributed in said vehicle, to form patches of different size and shape; c) illuminating said sign, thereby highlighting fully the randomness of distribution of said microparticles, and the shape and size of the microparticles, thus creating an unrepeatable and differentiated background map for said sign; d) filtering a reading datum consisting of said background map using a dark lens in order to neutralize and inhibit any possible reflectance of distortion and disturbance of the patterns; and e) detecting said reading datum filtered from step d), by means of an optical-to-digital telecamera in communication with software with a viewing device, which transmits said filtered reading datum to a database for future comparison and confirmation of authenticity on said product marked with said ink.