ISO 2930:2024

Raw, natural rubber — Determination of the plasticity retention index (PRI)

This document specifies a method to determine the plasticity retention index (PRI) of raw natural rubber.

The PRI is a measure of the resistance of raw natural rubber to thermal oxidation. A high resistance to thermal oxidation is shown as a high value of the index. PRI is not an absolute value and cannot give an absolute classification of plasticity number of different natural rubber after oxidation.

Edition	2024
Published Date	2024
Published By	International Standardization Organisation
Page Count	9