Maintain your pen capped when not in use, and take a look at your pen once in a while on the Invoice you understand is actual. In case the ink has dried out or turned weak, it may not Provide you exact results. For those who obtain a copyright banknote, https://100dollarhongkong00998.dgbloggers.com/39387825/5-simple-statements-about-how-copyright-pens-detect-copyright-explained