IS 101 : Part 3 : Sec 2 : 2025/ISO 2808 : 2019 Methods of Sampling and Test for Paints, Varnishes and Related Products - Part 3 Tests on Paint Film Formation - Section 2 Determination of film thickness
Revised Standard from Last Update.
NATIONAL FOREWORD
This Indian Standard (Part 3/Sec 2) (Fourth Revision) which is identical to ISO 2808 : 2019 'Paints and varnishes - Determination of film thickness' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Paints, varnishes and related products Sectional Committee and approval of the Chemical Division Council.
IS 101 'Methods of test for ready mixed paints and enamel', initially, was published as a unified standard in 1950 and it underwent revisions in 1961 and 1964 to update testing procedures. The third revision in 1989, due to the large size of IS 101, the committee decided to restructure it. Recognizing the need for clarity and organization, the standard was divided into multiple parts based on test types.
These parts included tests on liquid paints (general and physical), chemical examination, film formation, optical assessments, and mechanical tests on paint film formation. Each part was further subdivided into sections, addressing specific tests within those categories. Further, it was decided that whenever a new test method introduced, it would be integrated into the relevant part of IS 101 where it is most appropriate, ensuring that the standard remained comprehensive.
This document describes methods for measuring the film thickness of paints and related materials. The thickness of paint, or film thickness, is crucial for protection against corrosion, durability, and maintaining a uniform appearance. Adequate thickness ensures resistance to environmental damage, mechanical wear, and enhances the longevity and aesthetic quality of the painted surface.
In this fourth revision, the Committee, recognizing the significance of globally uniform practices, has decided to adopt ISO 2808 : 2019 as an Indian Standard under dual numbering.
This Indian Standard (Part 3) is published in several sections. The other sections of this series are:
Sec 1 Drying time
Sec 4 Finish
Sec 5 Determination of fineness of grind
Sec 6 Determination of the surface tension of liquid using the pendant drop method
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions and terminologies 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'; and
b) Comma (,) has been used as a decimal marker in the International Standard, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.