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Plastics and cable material is tested for its LOI value at both ambient temperature and elevated temperature to understand its oxygen requirement under actual fire conditions.
Materials with an LOI greater than the atmospheric oxygen concentration are called fire retardant materials.<ref>{{Cite web|url=https://www.ias.ac.in/article/fulltext/boms/015/01/0067-0076|website=www.ias.ac.in|access-date=2019-01-11|title=Fire-retardant materials}}</ref>
==See also==
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