IS 101 : Part 3 : Sec 6 : 2024/ISO 19403-3 : 2017 Methods of Sampling and Test of Paints, Varnishes and Related Products - Part 3 Test on Paint Film Formation - Section 6 Determination of the Surface Tension of Liquid Using the Pendant Drop Method
NATIONAL FOREWORD
This Indian Standard (Part 3/Sec 6) which is identical to ISO 19403-3 : 2017 'Paints and varnishes wettability - Part 3: Determination of the surface tension of liquids using the pendant drop method' 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. The standard was subsequently revised in 1961, 1964 and 1986. During the third revision, recognizing the need for clarity, the committee decided to restructure it by splitting into various parts based on type of tests. 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 was introduced, it would be integrated into the relevant part of IS 101, ensuring that the standard remained comprehensive.
The document specifies a test method to measure the surface tension of liquids with an optical method using the pendant drop. The method can be applied for the characterization of liquid coating materials.
This Indian Standard (Part 3) is published in several sections. The other sections of this series are:
Sec 1 Drying time
Sec 2 Film thickness
Sec 4 Finish
Sec 5 Determination of fineness of grind
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.