These are 2D nets made in Tinkercad that fold up to regular 3D polyhedra, specifically the tetrahedron, octahedron, and icosahedron which all have triangular faces.
Printed with a Makerbot Replicator 2 on "Standard", which is .2mm layer height. The nets are made to have .2mm (one layer) base thickness plus another .2mm (another layer) for the faces themselves, which are inset just a bit from the base layer so that fold lines develop naturally.
MakerHome Day 44: http://makerhome.blogspot.com/2013/10/day-44-tetrahedron-and-icosahedron-nets.html
This design and all associated pictures and files are licensed under the Creative Commons Attribution Non-Commercial Share Alike license. If you want to use designs, images, or files outside of the terms of this license, please email [email protected].