Rockwool : A fibrous product manufactured by a process of blowing or spinning from a molten mass of rock, usually basalt. The resultant fibres are subsequently collected as a mat of fibrous product. See also SMF
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}