Background
Counterfeit banknote detection pens are used to detect counterfeit Swiss franc, euro and United States banknotes amongst others. Typically, genuine banknotes are printed on paper based on cotton fibers, and do not contain the starches that react with iodine. When the pen is used to mark genuine bills, the mark is yellowish or colourless . Counterfeit pens are most effective against notes printed on standard printer or photocopier paper.
Read more about this topic: Counterfeit Banknote Detection Pen
Famous quotes containing the word background:
“Pilate with his question “What is truth?” is gladly trotted out these days as an advocate of Christ, so as to arouse the suspicion that everything known and knowable is an illusion and to erect the cross upon that gruesome background of the impossibility of knowledge.”
—Friedrich Nietzsche (1844–1900)
“In the true sense one’s native land, with its background of tradition, early impressions, reminiscences and other things dear to one, is not enough to make sensitive human beings feel at home.”
—Emma Goldman (1869–1940)