Cleveland Open Cup Flash Point Tester

This flash point and fire-point test method is a dynamic method and depends on definite rates of temperature increases to control the precision of the method. Its primary use is for viscous materials having a flash point between 79 deg C (175 deg F) and 400 deg C (752 deg F) except fuel oils, to define the hazards of flammable and combustible materials used in shipping and safety regulations. The temperature of the approximately 70 ml test specimen is increased rapidly at first and then at a slower constant rate as the flash point is approached. At specified intervals a test flame is passed across the cup, to measure the tendency of the test specimen to form a flammable mixture with air under controlled laboratory conditions.