ICS 83.060                          PCD 29

Reaffirmed 2021

NATIONAL FOREWORD

This Indian Standard (Part 9) (Second Revision) which is identical with ISO 1407 : 2011 ‘Rubber - Determination of solvent extract’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Methods of Test for Rubber and Rubber Products Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.

Methods of test for various characteristics of natural rubber were originally published under four different parts of IS 3660, which were subsequently revised and published as thirteen separate parts termed as NR Series for methods of test for natural rubber. Complete list of these standards showing correspondence of various test methods in the existing series of IS 3660, namely, their previous versions are given in National Annex A published at the end of this publication.

Method of test for determination of plasticity was originally covered under IS 3660 (Part II) : 1968 ‘Determination of solvent extract and nitrogen content’. During its first revision in 1989, it was published as IS 3660 (Part 9) : 1989, for which assistance was drawn from ISO/DIS 1407 ‘Rubber - Determination of solvent extract’, issued by the International Organization for Standardization (ISO). The ISO 1407 was revised in 2011 and the Committee has now decided to revise and adopt this standard to completely align it with the latest version of ISO 1407 : 2011 under dual numbering system.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.