Table 3.
Flame retardancy of wood products treated with difference spreading concentration.

Sample	Remaining flame time (sec)	Smoldering time (sec)	Carbonized area (mm2)	Carbonized length (mm)
	less than 10 sec	less than 30 sec	less than 5000 mm2	less than 200 mm
	A	0	0	8949	158.6
B	0	0	3286	87.0
C	0	0	3184	81.1
D	0	0	8987	164.6
E	0	0	4019	100.9
F	0	0	2848	79.6
G	0	0	8829	176.2
H	0	0	2506	84.4
I	0	0	2456	81.8
J	0	0	7461	127.8
K	0	0	5151	116.5
L	0	0	3694	95.1
M	0	0	3004	86.1