IS 101 : Part 11 : Sec 6 : 2024/ISO 4628-6 : 2023 Methods of Sampling and Test for Paints, Varnishes and Related Products - Part 11 Evaluation of Degradation of Coatings - Designation of Quantity and Size of Defects and of Intensity of Uniform Changes in Appearance - Section 6 Assessment of Degree of Chalking by Tape Method
NATIONAL FOREWORD
This Indian Standard which is identical to ISO 4628-6 : 2023 'Paints and varnishes - Evaluation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 6: Assessment of degree of chalking by tape 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 in 1986, 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.
This section IS 101 (Part 11/ Sec 6) provides pictorial reference standards for designating the degree of chalking of paint coatings. It also describes a method by which the degree of chalking is rated.
This Indian Standard (Part 11) is published in several sections. The other sections of this series are:
Sec 1 General introduction and designation system
Sec 2 Assessment of degree of blistering
Sec 3 Assessment of degree of rusting
Sec 4 Assessment of degree of cracking
Sec 5 Assessment of degree of flaking
Sec 7: Assessment of degree of chalking by velvet method
Sec 8 Assessment of degree of delamination and corrosion around a scribe or other artificial defect
Sec 10 Assessment of degree of filiform corrosion
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.