Table 4. Ozone Resistance Test of NR/BIIR for Various Measuring Time

Test time	T-1	T-2	T-3	T-4	T-5
24 hrs	C1	C2	B3	NC	NC
48 hrs	C1	C3	B3	NC	NC
72 hrs	C1	C4	B4	NC	NC
96 hrs	C1	C5	B5	NC	NC