... thickness of 50mm, K is 2.0W/m2K.Fire resistance: class B. According to the test repot issued by National Center for ... Equipment (No.: Zb200921913), refer to GB8624-2006, the result achieves class B.Smooth surface, up to 85% in light transmittance. According to ... one of pine, the result of smoke toxicity test is class ZA3.Due to the particular layer, which is of lighting ...