ISO 181:1981

Plastics — Determination of flammability characteristics of rigid plastics in the form of small specimens in contact with an incandescent rod

Specification of a method for determination of the relative flammability characteristics of small specimens of rigid plastics. Assessment of the flammability after bringing its free end into contact with a silicon carbide rod electrically heated to 955 °C, for a specified period of time. The result is expressed as the average burning time and the average destroyed length.