Why do you suppose the printers of copyright U.S. currency don’t coat their paper products and solutions with Aqua Internet and White Rain to defeat the “detection” pens? Or can it be achievable they use a little something they've got out there within their nation and it degrades with time? https://sergiotybfi.bloggactivo.com/33234565/getting-my-super-undetectable-banknotes-to-work