Wakonda's Lost Wax Process for Solar : Greentech Media

Wakonda's Lost Wax Process for Solar : Greentech Media: "The key is the process. The company takes a sheet of copper and heats it to create a repeating grain pattern. The copper is then coated with another substance, which effectively becomes a mold of the pattern in the copper. The copper is then eliminated and active solar materials are added. Because of the shape of the second substrate, the solar materials take on the same pattern of the now-absent copper."