[RockinRight]

I rarely carry cash either.

[Wooly]

Paper currency has been made with rag based paper since I can remember so no news here. But this may help you, those pens that stores use to see if your 20 dollar bills are real are not worth anything and may detect a real bill as a fake. You see they are filled with an iodine based liquid and the detection is based upon the ideal that copier paper has starch in it which will turn purple in the presence of iodine. A rag based real dollar bill has no starch on it and will not cause a color change from the pen mark. However the problem here is that a real dollar bill can be contaminated with starch from many sources leading to a false positive.