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This International Standard specifies the performance requirements for the Limited Flame Spread properties of all materials, all material assemblies and protective clothing in order to reduce the possibility of the clothing burning when in occasional and brief contact with small flames and thereby itself constituting a hazard. Additional requirements for clothing are also specified, including design requirements, mechanical requirements, marking and information supplied by the manufacturer. When protection against heat hazards is necessary in addition to protection against flame, this standard is not appropriate. Standards such as ISO 11612, should be used. A classification system is given for materials, material assemblies and garments which are tested according to ISO 15025, Procedure A.