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The flash point of a volatile material is the lowest temperature at which it can vaporise to form an ignitable mixture in air. Measuring a flash point requires an ignition source. At the flash point, the vapor may cease to burn when the ignition source is removed. The flash point is not to be confused with the autoignition temperature (which does not require an ignition source) or with the fire point (the temperature at which the vapor continues to burn after being ignited). Neither the flash point nor the fire point is dependent on the temperature of the ignition source, which is much higher. ==Liquids== The flash point is a descriptive characteristic that is used to distinguish flammable liquids (such as petrol) from combustible liquids. It is also used to characterize the fire hazards of liquids. Liquids which have a flash point less than , depending on the standard that is used, are called flammable — whereas liquids having a flash point above that temperature are called combustible.〔(NFPA 30: Flammable and Combustible Liquids Code, 2012 Edition ) Retrieved January 4, 2014.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「flash point」の詳細全文を読む スポンサード リンク
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