Although Cryptoglyph is invisible to the naked eye, AlpVisionâ€™s authentication feature can be instantly detected with a smartphone and a proprietary application. One version of this application is specifically designed for printers. This mobile app allows printers to detect the presence of a signal in real-time and in turn control the quality of millions of printed sheets at a time. With the new software update, printers will now be able to detect a lack of print finish, such as varnish, typically resulting in an excessively high signal (displayed in yellow on the image) and therefore compromising the security of the printed safety feature. Although these cases are extremely rare, this update will no doubt give the needed reassurances for top-level quality control.