Standard Test Method for Softening Point Resins (Mettler Cup and Ball Method)
In general, with materials of these types, softening point does not take place at a definite temperature. As the temperature rises, these materials gradually change from brittle or exceedingly thick and slow-flowing materials to softer and less viscous liquids. For this reason, the determination of the softening point must be made by a fixed, arbitrary, and closely defined method if the results obtained are to be comparable.
1.1 This test method covers the determination of softening point of resins using a Mettler cup and ball apparatus, and may, under user defined condition, give results comparable to those obtained by Test Method E 28.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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