"Condensation discriminance" is based on animal and vegetable oils (especially common peanut oil) freezing point different principles to determine whether it is the waste oil, but this method also may do wrong to some good edible oil.
Solidification point temperature is related to the fat content, in the refining process, the more thorough degreasing, the lower solidification point temperature.
Early time "oil" and "fat" concept awareness of edible oil is not high, with refinery process backward, so simple judgment based on raw oil cooling condensation is some truth.
In recent years, oil production technology continue to improve, even if the same kind of vegetable oil due to the different production process, will have different freezing point.
Today, with the improvement of the refining process can also produce different saturated fat with unsaturated fat percentage of edible oil, which also determines the different freezing point.
Some edible oil producers will choose different melting points according to weather variations, change the proportion of the ingredients blend oil.
