The DSC test measures the difference in heat flow between a reference sample and test sample. As the test sample is heated and cooled, it will undergo phase transitions. The DSC test uses a temperature program that increases and decreases temperature linearly as a function of time. By conducting this test, the amount of heat absorbed or released during such transitions can be measured. DSC is used to measure material and product properties such as melting point, crystallization events and glass transition temperatures (Tg).