IS 101 : Part 4 : Sec 4 : 2020/ISO 2813 : 2014 Methods of Sampling and Test for Paints, Varnishes and Related Products -Part 4 Optical Test - Section 4 Gloss-Determination of gloss value at 20°, 60° and 85°

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 4/Sec 4) (Fourth Revision) which is identical with ISO 2813 : 2014 ‘Paints and varnishes — Determination of gloss value at 20°, 60° and 85°’ 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 and 1988. Clause 7.7 of IS 101 : 1964 ‘Methods of test for ready mixed paints and enamels (second revision)’ was superseded during third revision of standard and this standard was developed and published in 1988 as (Part 4/Sec 4) of IS 101 series of standards.

The major changes in this revision are as follows:

a) the title has been changed;

b) the scope has been extended to include gloss measurement of metallic coatings;

c) the term “specular gloss” has been replaced by “gloss”;

d) the gloss value is indicated in gloss units (GU);

e) a new annex (Annex A) concerning possible sources of error has been added;

f) a new annex (Annex B) concerning calibration standards has been added;

g) a new annex (Annex C) concerning gloss calculation of primary reference standards has been added;

h) a new annex (Annex D) concerning details on precision has been added; and

j) the precision data are the results of a large interlaboratory test.

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.