Electrical Ignition source
This test is used to determine the flammability and ignition characteristics of a test specimen.
The method comprises two tests in which the glow wire flammability index and the specimen’s glow wire ignition temperature when the temperature is increased are determined with the help of a glow wire.
 Test set-up |
 Electrical Ignition source |
GWFI (glow wire flammability index)
This test is used to determine the glow wire flammability index.
Pre-treatment:
48h / 23°C / 50% relative humidity.
| Test temperature in °C | 550 | 600 | 650 | 700 | 750 | 800 | 850 | 900 | 960 |
| Contact time | 30 s | ||||||||
Test criteria for three consecutive test specimens of the same thickness:
a) Highest temperature at which the flames or glow are extinguished within 30 s of removing the glow wire
b) Tissue paper underlay for the test specimen does not ignite
c) Test specimen does not ignite
GWIT (glow wire ignition test)
This test is used to determine the glow wire ignition temperature
Pre-treatment:
48h / 23°C / 50% relative humidity
| Test temperature in °C | 500 | 550 | 600 | 650 | 700 | 750 | 800 | 850 | 900 | 960 |
| Contact time | 30 s | |||||||||
Test criteria for three consecutive test specimens of the same thickness: highest temperature at the end of the glow wire at which there is no ignition during the contact time (ignition lasting longer than 5 s). The glow wire ignition temperature is 25 °C higher (30 °C higher if between 900 °C and 960 °C) than the highest temperature measured at the end of the glow wire.
Test criteria:
a) No flames and no glow
b) Flames or glow extinguished within 30 s of removing the glow wire
c) Tissue paper underlay does not ignite
Electrical Ignition source
