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SRPS ISO 2930:2025

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

Aug 29, 2025

General information

60.60     Aug 29, 2025

ISS

G045

International Standard

83.040.10  

English  

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS ISO 2930:2019

NOW

PUBLISHED
SRPS ISO 2930:2025
60.60 Standard published
Aug 29, 2025

Related project

Adopted from ISO 2930:2024 IDENTICAL