IS 2267 : Part 1 : 2024/ISO 24022-1 : 2020 Polystyrene (PS) Moulding and Extrusion Materials - Part 1 Designation System and Basis for Specification
NATIONAL FOREWORD
This Indian Standard (Part 1) (Third Revision) which is identical to ISO 24022-1 : 2020 'Plastics - Polystyrene (PS) moulding and extrusion materials - Part 1: Designation system and basis for specifications' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Plastics Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.
This standard was first published in 1962 and subsequently revised in 1972 and 1995. This revision has been undertaken to align it with latest version of ISO 24022-1 : 2020 and ISO 24022-2 : 2020. As the ISO standard is available in two parts, the Committee decided to bifurcate the standards, as given below:
Part 1 Designation system and basis for specifications
Part 2 Preparation of test specimens and determination of properties
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions 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 while in Indian Standards, the current practice is to use a point (.) as the decimal marker.