I am involved in a medical device development that utilizes two ceramic face seal parts. The parts are 31.5 mm in diameter and 6 mm thick. We mark an ID on the side of each part for traceability. We have been doing this by hand with a good old Sharpie® ultra fine point marker. To date we have put ID's on more than 18,000 seals, by hand! It is time that we step up to something slightly automated. I am not looking for highly automated equipment to do hundreds of thousands or millions of parts, just a few thousand at a time. I need something to put alpha-numeric characters on the curved side of each seal, in increasing numerical order. Any suggestions?