ICS 85.040                          CHD 15

Reaffirmed 2021

NATIONAL FOREWORD

This Indian Standard (Part 8/Sec 1) (First Revision) which is identical with ISO 5269-1 : 2005 ‘Pulps — Preparation of laboratory sheets for physical testing — Part 1: Conventional sheet-former method’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Paper and Its Products Sectional Committee and approval of the Chemical Division Council.

For obtaining good quality of paper, it is essential that the pulp which goes into the manufacture of paper is properly cooked and bleached. For forecasting the strength of paper to be produced from pulp and for comparison of different types of pulp it is essential to carry out physical tests on sheets of pulps. For the test to be reproducible and the comparison to be meaningful it is essential that pulps are subjected to exactly the same type of beating and sheet making treatment before these tests are carried out. This standard was originally published in 1973 laid down details of the equipment and the procedure to be followed for above operations and the physical tests to be carried out on sheets.

Considering the importance of following the uniform practices globally, the committee felt the need of revising this standard and also felt that it would be more appropriate to prepare this standard method by adoption of ISO 5269-1 on dual number basis.