Revision as of 23:40, 11 April 2016 edit 66.248.41.103 (talk) →Reception ← Previous edit		Revision as of 23:42, 11 April 2016 edit undo 66.248.41.103 (talk) →Design Flaw Next edit →
Line 75: ====Design Flaw==== The effectiveness of the pens may be skewed- one way or the other. Simply having a banknote ~~passing~~pass through laundry, depending on the soaps and bleaches used, can cause a bill to fail the test when it is otherwise OK. Additionally, it was discovered almost immediately that changing the acidity of a note, or most any other piece of paper, a napkin, typical typing paper, cardboard, et cetera, with lemon juice, will cause a false positive, that is, a place mat in a restaurant with lemon juice on it will appear to be a valid banknote. ==See also==

Counterfeit banknote detection pen: Difference between revisions