here's the link to the article
https://www.shapeways.com/blog/archives/38008-bronze-age-meets-digital-age-art-tim-belliveau.html
Shapeways is a commercial service for 3D printing, using their industrial printers (laser sintering, metal printing...) to make some high-quality items.
The service is good, though for some reason the shipping fees, no matter the size of the shipped object, are rather large.
very interesting to see the molds.