NATIONAL FOREWORD

The Indian Standard (Part 4) which is identical with ISO 4892-4 : 2013 ‘Plastics — Methods of exposure to laboratory light sources — Part 4: Open-flame carbon-arc lamps’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Methods of Sampling and Test for Plastics Sectional Committee and approval of the Petroleum, Coal and Related Products Division Council.