By George Hart for the Museum of Mathematics Color 3D printing allows one to make beautiful objects that are pretty much impossible to fabricate by any other technique. Here is a 9-inch diameter sculpture I designed and built on a 3D Systems Zprinter 450. The underlying geometry is based on one of the well-known stellations of the icosahedron, but I modified it, punctured it, and colored it to suit my taste.  If you are lucky enough to have access to a color 3D printer, you can make a copy for yourself using the data file available here. Below is a closeup shot of another example in this series, which emphasizes curves and gradations of color. You can see the rest of it and a series of related 3D printed color forms see here.  More:
See all of George Hart’s Math Monday columns

Chris Locke from Heartless Machine If you have already been watching MAKE’s alt.SXSW livestream, stay tuned today until 3:30 CST and you’ll catch MAKE’s official SXSW podcast. We are doing a SXSW Maker Show and Tell, profiling local Austinites and makers here for THE FESTIVAL. (If you have a SXSW badge, the panel is 3:30 at Driskill Hotel’s Maximillian Room, 6th and Brazos.) Some of the fun we’ll be having: - Joe DiPrima of ArcAttack! will be showing off some mad electricity tricks.
- Christopher A. Locke’s Heartless Machines (pictured)
- Dr. Bleep of Bleeplabs fame
- Ethan Reesor’s Jacob’s ladder
- Austin Tinkering School’s giant bow & arrow project
- 17 year old Markus Clardy’s “Android in Steel”
- YOU! If you’re here for SXSW and have a project you’d like to show off, come to the Driskill / Maximillian Room by 3 PM.
See all the #MakeSXSW coverage at http://www.livestream.com/oreillymake ALSO at SXSW: The MAKE and O’Reilly booth is hopping! Learn to solder, meet makers, see the new MakerBot Replicator, shop O’Reilly publications, MAKE, and O’Reilly special swag and free MAKE Kits Special Issue. Come say hi; we’re booth #510 in the Convention Center Trade Show.

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