CO2 process, CO2 casting process, sodium silicate/CO2 process, sodium silicate-CO2 molding, sodium silicate–CO2 moulding, silica gel mold process
liiva ja vesiklaasi segust vormide või kärnide kõvendus süsihappegaasi läbipuhumise teel, a process for hardening molds or cores in which carbon dioxide gas is blown through dry clay-free silica sand to precipitate silica on the form of a gel from the sodium silicate binder
