Mineral and sapphire watch-glasses - Anti-reflective treatment Ingestion-build-232773 BS EN IEC 60027‑2:2019 supersedes

BS EN IEC 60027‑2:2019 supersedes BS EN 60027‑2:2007

the siphon-can and buoyancy methods have been omitted as they are rarely used

and in thermosetting materials

selection of a test sample

The main aim of BS EN 15258 is to provide the best industry guidance on ensuring your precast concrete products such as retaining walls are reliable for use

Mineral and sapphire watch-glasses - Anti-reflective treatment Ingestion-build-232773 BS EN IEC 60027‑2:2019 supersedes1 Scope This document specifies the terms and definitions, the test methods and the evaluation of results of watch glasses with anti reflective treatments. The document is applicable to sapphire watch glasses with anti reflective treatments, and it can also be used as a reference for mineral watch glasses with anti reflective treatments.