BS IS0 21575:2018 Bsl Standards Publication Optics and photonics Optical materials and components The powder test method for the water resistance of optical glass bsi. BSISO21575:2018 BRITISH STANDARD Nationalforeword This British Standard is the UK implementation of IS021575:2018. The UK participation in its preparation was entrusted to Technical Committee CPW/172, Optics and Photonics. A list of organizations represented on this committee can be obtained on requestto its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. TheBritish Standards Institution2018 Published by BSI Standards Limited 2018 ISBN9780580953880 ICS37.020 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on30June2018. Amendments/corrigendaissuedsincepublication Date Textaffected BS ISO 21575:2018 ISO INTERNATIONAL 21575 STANDARD First edition 2018-07-05 Optics and photonics Optical materials and components The powder test method for the water resistance of optical glass OptiqueetphotoniqueMateriaux etcomposants optiques Méthoded'essaisurpoudrepour déterminer la résistance a I'eau des verres optiques Reference number IS0 21575:2018(E) X ISO @IS02018