How to determine UL94 classed V-2 testing
As per UL94 standard, a material shall be classified V-2 as described as below:
Afterflame time for each Individual specimen t1or t2 : ≤30s
Total afterflame time for any condition set ( t1 plus t2 for the 5 specimens): ≤250s
Afterflame plus afterglow time for each Individual specimen after the second flame application （t2+t3): ≤60s
Afterflame or afterglow of any specimen up to the holding clamp: No
Cotton Indicator Ignited by flaming particles or drops : Yes
Zhilitong Electromechanical Co., Ltd produces UL94 Burning Tester, which can perform UL94 classed V-1 testing.