Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 21) (First Revision) which is identical with ISO 638 : 2008 ‘Paper, board and pulps - Determination of dry matter content - Oven-drying method’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Paper and its Products Sectional Committee and approval of the Chemical Division Council.

This standard was originally published in 1984 which was based on ISO 638 : 1978 ‘Paper, board and pulps - Determination of dry matter content - Oven-drying method.’ The Committee decided to further revised the standard by adopting latest version of ISO 638 on dual number basis.

This standard describes the oven-drying method for determination of dry matter content of the pulp. This method is applicable to moist or air-dry pulp which does not contain any appreciable quantity of matter, other than water, volatile at the temperature specified for the drying. It is used, for example, with pulp samples taken for chemical and physical tests in the laboratory, which require concurrent determination of dry matter content.

The text of the ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and 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.