Definitions for "MELT POINT"
the temperature at which a material changes phase from solid to liquid. Petroleum waxes usually do not melt at sharply defined temperatures because they are mixtures of hydrocarbons with different melting points. Paraffin waxes are relatively simple mixtures and can have narrower melting ranges than microcrystalline waxes and petrolatums which are more complex in composition and melting behavior. Paraffin waxes are usually marketed on the basis of melting point determined from the plateau in the cooling curve measured in ASTM D87. Other methods of melt point determination are available, depending on the composition of the wax. Drop melting point (ASTM D126) is used for amorphous waxes, e.g. microcrystallines, but is not reliable for higher viscosity synthetic wax, for which ring-and-ball softening point (ASTM D36) should be used. Open or closed capillary tubes are used to measure the melting point of many natural waxes. The congealing point (ASTM D938) is the temperature at which a melted wax ceases to flow, and is more consistent than melting points for some waxes.
The point at which wax melts. Remember that waxes with the same melt point do not necessarily have the same properties.
The temperature at which a finely divided powder will begin to melt & flow.