Sharpie Makes Soft Metals Easier to Cut (IMAGE) Purdue University Caption The application of a permanent marker, glue or tape makes gummy metals such as aluminum, stainless steels, copper and tantalum much easier to cut for industrial applications. Credit Purdue University image/Erin Easterling Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.