Instruments as per ASTM D1525-00

Standard Test Method for Vicat Softening Temperature of Plastics

This test method covers determination of the temperature at which a specified needle penetration occurs when specimens are subjected to specified controlled test conditions. This test method is not recommended for ethyl cellulose, poly (vinylidene chloride), nonrigid poly(vinyl chloride), or other materials possess a wide Vicat softening range.