“Solar sinter” by Markus Kayser

“3D-printing machine that uses sunlight and sand to make glass objects in the desert” by the artist  Markus Kayser.

“The device uses a large Fresnel lens to focus a beam of sunlight, creating temperatures between 1400 and 1600 degrees Celsius. This is hot enough to melt silica sand and build up glass shapes, layer by layer, inside a box of sand mounted under the lens. Solar-powered motors move the box on an x and y axis along a computer-controlled path.” (…)

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(via dezeen)