Under a Creative Commons Attribution-ShareAlike license, Autodesk is now sharing the formula for its Polar Resin Number 48 (PR48) printing filament.
Regarding the polar resin, Eric J. Wilhelm, Head of Autodesk’s hardware group says: "We’re explicitly inviting you to understand, remix, and remake our resin." The 3D printing resin will soon be available for purchase on Autodesk's site, although it will be possible for makers to create their own from the formula. Since we wouldn't have the desktop 3D printer without open source technology, it's exciting to imagine the possibilities that sharing this resin will have on the maker community.
It's also worth noting that Autodesk is now taking orders for Ember, its stereolithographic 3D printer. Priced at nearly $6,000, this is not the most accessible 3D printing tool, but this open-source resin certainly is.