A sand mold, made of special sand held together by a binder, is built up around a rigid positive, usually in a number of sections held together in metal boxes.
In investment casting a mold is made by drying a refractory slurry on a pattern made of wax or plastic.
The casting mold was made by SU-8 deep UV lithography.
A wafer mold was made by lithography with a negative resin (SU8-2035).
Male and female master molds were made by printing poly(lactic acid) (PLA) using a 3D printer (Makerbot Replicator 2, Makerbot).
Reference materials with two concentration levels of heavy metals were prepared by spiking Pb and Cd compounds to epoxy molding compounds made by mixing silica powders and epoxy resin.
Master molds were made by patterning 100 μm thick negative photoresist (Su-8 50, Microchem, MA) on a Si Wafer.
The PDMS molds were made by casting from SU8 2150 (MicroChem, U.S.A) master fabricated on a silicon wafer by following the standard photolithography process as per manufacturer's instructions.
Simple terra-cotta molds can be made by pressing clay around a rigid positive form.
These figurines were laser-scanned by Jon Lash's team at Digital Atelier, and then they were blown up so silicone molds could be made by Mike Perrotta at Sculpture House.
