NATIONAL FOREWORD

This Indian Standard [P : 25/Sec 1] (Second Revision) which is identical with ISO 3104 : 1994 ‘Petroleum products ? Transparent and opaque liquids ? Determination of kinematic viscosity and calculation of dynamic viscosity’ 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 Petroleum, Petroleum Products and Lubricants Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.

The Standard was first revised in 1976 by adapting joint publication ASTM D 445/72/IP/71/75. The Committee decided to harmonize the standard with international standard. As the scope of IS 1448 [P : 25] was covered under two different ISO standards that is ISO 3104 and ISO 3105, it was decided to bifurcate IS 1448 [P : 25] into two sections corresponding to each of the ISO standard. Accordingly, two separate standards have been published, Section 1 covering methods of test and Section 2 covering the specification and operating instructions for glass capillary viscometers.

Consequent to publication of both Section 1 and Section 2 of [P : 25], this standard [P : 25] shall be treated as withdrawn.

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.