Graphical symbols — Safety colours and safety signs — Part 2: Measurement of photopic luminance of phosphorescent components used in a natural disaster safety way guidance system (ISO 22578-2:2024)
< p class=" MsoBodyText" > < span lang=" EN-GB" > This document specifies the laboratory test method for the measurement of photopic luminance of phosphorescent materials classified in accordance with ISO 22578.< / span>
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