BS IS0 720:2020 BSl Standards Publication Glass Hydrolytic resistance of glass grains at 121 C Method of test and classification bsi. BSISO720:2020 BRITISH STANDARD Nationalforeword This British Standard is theUK implementation of IS0720:2020.It supersedes BS3473-3:1987,whichiswithdrawn. The UK participation in its preparation was entrusted to Technical CommitteeCH/212,IVDs. A listoforganizationsrepresented onthis committee can be obtained on requestto its committeemanager. This publication does not purport to include all the necessary provisions of a contract.Users are responsible for its correct application. @The British Standards Institution2020 Published by BSI Standards Limited 2020 ISBN 978 0539 047936 ICS81.040.01 Compliance with aBritish Standard cannot conferimmunityfrom legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2020. Amendments/corrigendaissuedsincepublication Date Text affected BS ISO 720:2020 ISO INTERNATIONAL 720 STANDARD Third edition 2020-09 Glass Hydrolytic resistance of glass grains at 121 °C - Method of test and classification Verre-Resistancehydrolytiqueduverreengrainsa121C- Méthoded'essaietclassification Reference number ISO 720:2020(E) ISO @IS02020