Table 1.
Abbreviation list for specimens used in this study.

Abbreviation	Samples	Flame retardant condition	Treatment method
A	Pinus koraiensis plywood	-	-
B		300 g/m2	spreading
C		500 g/m2	spreading
D	Larix kaempferi plywood	-	-
E		300 g/m2	spreading
F		500 g/m2	spreading
G	Chameacyparis obtusa louver	-	-
H		300 g/m2	spreading
I		500 g/m2	spreading
J	Betula platyphylla perforated plate	-	-
K		150 g/m2	spreading
L		300 g/m2	spreading
M		500 g/m2	spreading
N		10, 30, 60, 90, 120, 240 min	impregnation