ISO 22578-2:2024 PDF

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

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Title (English):

ISO 22578-2:2024

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

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 6
Publication date:: February 27, 2024
Edition:: ISO IS 22578 edition 1 version 1
ICS:: 01.080.10

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Description (English):

This document specifies the laboratory test method for the measurement of photopic luminance of phosphorescent materials classified in accordance with ISO 22578.

Technical details

Technical committee: ISO/TC 145/SC 2 - Safety identification, signs, shapes, symbols and colours
SKU: ISO 22578-2:2024

Abstract

Overview

ISO 22578-2:2024 specifies a laboratory test method for measuring the photopic luminance of phosphorescent materials used in natural disaster safety way guidance systems (SWGS). The standard defines how to prepare specimens, excite phosphorescent components, measure emitted light over time, and report results so products can be classified and marked consistently for safety signage and escape-route guidance.

Key topics and technical requirements

Specimens and conditioning
- Test three specimens representative of the production batch.
- Each specimen must have at least a 35 mm phosphorescent area.
- Pre-condition in complete darkness for at least 48 hours.
Ambient and environmental conditions
- Test and conditioning ambient: 23 °C ± 2 °C and 50 % ± 10 % relative humidity.
- Measurement chamber light level must be at least one order of magnitude lower than the lowest expected luminance.
Excitation
- Excite specimens for 60 minutes using a xenon-arc source (mean irradiance ~400 mW/cm²) or 3 000 lx from a D lamp.
- Uniform irradiance/illuminance across five test patches is required (max/min ratio

Related standards

Other ISO standards

Overview

Key topics and technical requirements

Specimens and conditioning
- Test three specimens representative of the production batch.
- Each specimen must have at least a 35 mm phosphorescent area.
- Pre-condition in complete darkness for at least 48 hours.
Ambient and environmental conditions
- Test and conditioning ambient: 23 °C ± 2 °C and 50 % ± 10 % relative humidity.
- Measurement chamber light level must be at least one order of magnitude lower than the lowest expected luminance.
Excitation
- Excite specimens for 60 minutes using a xenon-arc source (mean irradiance ~400 mW/cm²) or 3 000 lx from a D lamp.
- Uniform irradiance/illuminance across five test patches is required (max/min ratio

ISO 22578-2:2024 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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