Our single and full color printing processes are both extremely durable and in most cases, the ink will outlast the guitar pick.  As with all inks and plastics, they will begin to wear at the point the guitar pick makes contact with metal strings and may be slightly noticeable with full color printing due to the amount of ink used.  You will find that in most cases, general contact with your fingers will not wear the ink prior to the guitar pick being worn out.  Our parent company has been making guitar picks for almost 100 years now and we have never really found a problem with our ink.