The horizontal burning test is used to determine the HB flammability rating of a material.
The flammability rating is calculated for a test specimen as a function of the burning rate and taking account of the material thickness.
48 hours / 23°C / relative humidity
|20 mm high Tirill burner flame
|Flame application time:
|If the flame front reaches the first mark within 30 s, flame application is discontinued.
|Burning rate in V
|Test specimen thickness 3 - 13 mm
|≤ 40 mm/min
|Test specimen thickness ‹ 3 mm
|≤ 75 mm/min
|Flame is extinguished before first mark
|= 0 mm/min