Ultrachrome

Ultrachrome was a substance that could be used instead of cortosis to shape a suit of armor. It could also protect from radiation, similar to chromium. During the Clone Wars, it was fashionable for Separatist nobles to obtain swords made of ultrachrome - these blades were highly resistant to lightsabers.

Text and facts from the “Ultrachrome” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.