... -1900mm 2,Area density:20-600gsm 3,Flame retardant Fire-proof paperDescription:Our company is one of a few company in China which ... documental papers. Products are tested by NFTC and fire-proof property reaches B1 grade.Main technical parameters:1, Oxygen index ≥ 44 ... , In addition, we could manufacture using the materials customer offers.Flame-retardant testing: Light the paper, and there is no ...