Gummy Metals? Add Glue or Markers (VIDEO) Purdue University This video is under embargo. Please login to access this video. Caption Everyday permanent markers, glue sticks and packing tape may offer a surprisingly low-tech solution to a long-standing nuisance in the manufacturing industry: Making soft and ductile, or so-called "gummy" metals easier to cut. Credit Purdue University/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.