Non-flammable degree Thickness 1/8°above Thickness 1/8°below
HB HB Burning speed 1.5 inch/min below HB Burning speed 3.0 inch/min below
 
  V-0 V-1 V-2
  Each sample's 1st and 2nd burning time   Less than 10 second?/td>   Less than 30 second   Less than 30 second
  Sum of each sample's 2nd burning time and glowing time   Less than 30 second   Less than 60 second   Less than 60 second
  Sum of each sample's 2nd burning time and glowing time   Less than 50 second   Less than 250 second  Less than 250 second
  Ignition of cotton caused by flame drop   should be none   should be none   should be none
 
Judgment Criteria 5VA 5VB note
Total sum of burning time and glowing time 60seconds 60
Ignition NO NO
Occurrence of Hole on the center of sample NO Yes Plaque Test