Ignitability index (Ig) : That index number for ignitability which is determined according to the standard test method for measuring the properties of lining materials
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}