Photoluminescent Egress Marking Coatings — ISO 16069, ASTM E2072, and Selection in Thailand

When a fire or blackout strikes, the most dangerous thing is people unable to find the "exit" in the dark — emergency lights can fail (dead batteries, burned wiring) and smoke obscures ceiling lights. Photoluminescent coatings solve this: guiding escape with no electricity at all.

This article explains the principle, the ISO 16069 / ASTM E2072 standards, the classes, and where to install — for buildings in Thailand.

1. The Principle — Glowing Without Power

Photoluminescent pigment (usually strontium aluminate) absorbs light from normal lighting, then emits a glow when dark:

• No electricity, no batteries, no maintenance cost
• Brightest immediately when dark, then fades, but visible for hours
• Unlike emergency lights (batteries die / wiring burns) — photoluminescent always works once charged with enough light

2. Standards and Class Classification

Class A-D (PSPA) is measured by luminance decay — brightness (mcd/m²) at 10 minutes and 60 minutes after light is removed. Higher class = stays bright longer.

3. Where to Install (ISO 16069 = Continuous System)

flowchart TD
  A[Escape guidance system ISO 16069] --> B[Stair nosing
+ handrails]
  A --> C[Floor pathway lines
Low-Location Lighting]
  A --> D[EXIT signs + directional arrows]
  A --> E[Fire-equipment locations]
  A --> F[Obstacle marking]

Emphasize low-location (near the floor) because smoke rises and escapees crouch/crawl low — high markings are invisible in smoke.

4. Format — Coating vs Tape vs Signs

• Glow coating — applied as continuous lines on floors/stair edges/walls, durable, ideal for large areas
• Tape — fast install, small jobs
• Signs — ready-made EXIT/arrows

Choose by surface, resistance to foot traffic/abrasion, and the continuity required.

5. Selection Checklist

1. Choose the class by route importance + required escape time (luminance decay)
2. Build a continuous system (ISO 16069), not a single point
3. Emphasize low-location against smoke obstruction
4. Surface prep + traffic/abrasion-resistant grade for floors
5. Supplement emergency lighting — use together, not instead

We supply photoluminescent coatings and materials for emergency egress to ISO 16069 / ASTM E2072 — continuous-line coatings, stair edges, EXIT signs, and low-location marking — with guidance on choosing the class for your building's escape routes (part of our industrial coatings line).

Talk to our engineering team to set up a glow egress-guidance system — call 02-096-2118 or LINE OA @sahawatt1988.

Summary

• Photoluminescent = glows without power — guides escape even in a blackout / emergency-light failure
• Standards: ISO 16069 (way guidance) + ISO 17398 / ASTM E2072 / DIN 67510
• Class A-D by luminance decay (mcd/m² at 10/60 minutes)
• Install as a continuous system, emphasizing low-location (against smoke)
• Use to supplement emergency lighting, not replace it

A maintenance-free, no-electricity safety investment — installed once, guiding escape every time it goes dark.