Plastic combustion test flame retardant grade for FH1 what mean?

Plastic combustion test flame retardant grade for FH1 what mean?

Here are the ministry of public security fire department reply: FH - 1 combustion performance is derived from the national standardization technical committee plastic under centralized management of GB/T 2408-1996 "plastic combustion performance of horizontal and vertical method". Specified in this standard, for the combustion performance of material, by using level test, according to ignite after combustion behavior into FH - 1, 2, 3, 4, 4, which represents the combustion performance of FH - 1 is better than that of other grades.