BS ISO 289-2:2020 pdf free.Rubber, unvulcanized - Determinations using a shearing-disc viscometer.Determination of pre-vulcanization characteristics. BS ISO 289-2 1 Scope This document specifies a method for determining the pre-vulcanization characteristics of compounded rubber. The pre-vulcanization characteristics determined by this method provide a means of estimating how long compounded rubber can be maintained at high temperatures and remain processable. 2 Normative...