Cold Behaviour measurement - pour point, cold point, freeze point and cold filter plugging point - are used to determine the flow characteristics of petroleum at low temperatures. These measurements basically define the lowest temperature that the product can be used in the intended application.
Pour point is the temperature at which a petroleum product will no longer flow.
Cloud point is the temperature at which the formation of wax crystals begins to affect the product's flow characteristics, particularly through small orifices and filters.
Freezing point is a measurement of the lowest temperature at which an aviation fuel will remain free of solid hydrocarbon crystals that could restrict the flow of fuel through filters.
Cold filter plugging point measures the filterability of diesel fuels