The ink reacts with starch in Wooden-based paper to produce a black or blue mark even so the paper in an actual Invoice contains no starch, so the pen mark remains unchanged. Having said that, your stint to be a counterfeiter wouldn't be incredibly profitable. The $20 Invoice which is https://fakemoneynotestoprint82592.canariblogs.com/the-best-side-of-how-to-make-fake-notes-43323641