Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 5/Sec 3) (Fifth Revision) which is identical with ISO 6272-1 : 2011 ‘Paints and varnishes — Rapiddeformation (impact resistance) tests — Part 1: Falling-weight test, largearea indenter’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Paints, Varnishes and Related Products Sectional Committee and approval of the Chemical Division Council.

This standard was originally published in 1950 and subsequently revised in 1961, 1964, 1988 and 1999. During fourth revision of IS 101 (Part 5/Sec 3), considerable assistance was derived from

ISO 6272 :1993 ‘Paints and varnishes — Falling weight test’, issued by the International organization for Standardization. ISO has published its above standard in two parts:

ISO 6272-1 : 2011 Paints and varnishes — Rapid-deformation (impact resistance) tests — Part 1: Falling-weight test, large area indenter. ISO 6272-2 : 2011 Paints and varnishes — Rapid-deformation (impact resistance) tests — Part 2: Falling-weight test, small-area indenter

The committee decided to adopt both the parts of this series to have complete set of test of impact resistance by falling weight method. The fifth revision of IS 101 (Part 5/Sec 3) was undertaken to align it with ISO 6272-1. The other Indian standard for adoption of ISO 6272-2 on this test would be:

IS 101 (Part 5/Sec 5) Methods of sampling and test for paints, varnishes and related products: Part 5 Mechanical tests, Section 5 Impact resistance — Falling-weight test, small-area indenter.

In this revision, title of the standard has also been modified.

The text of 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/document’ 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.