BS EN ISO 306:1997- Plastics. Thermoplastic materials. Determination of Vicat softening temperature (VST)
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This International Standard specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials:
-Method A50 USING FORCE OF 10 N and a heating rate of 50 ''C/h
-Method B50 USING FORCE OF 50 N and a heating rate of 50 ''C/h
-Method A120 USING FORCE OF 10 N and a heating rate of 120 ''C/h
-Method B120 USING FORCE OF 50 and a heating rate of 120 ''C/h