Item/Index /Grade	Water content	Ash content	Extraction of acetone	Stretch strength	Elongation rate	Menni viscosity
	%≤	%≤	%≤	MPa≥	%≥	ML(100°C,1+4) ≤
A	1.20	8.00	20.00	18.0	500	85
B	1.20	10.00	25.00	16.0	450	80
C	1.20	11.00	28.00	14.0	400	75
D	1.20	12.00	25.00	12.0	380	75
E	1.20	12.0 0	20.00	10.0	360	70
F	1.20	12.00	20.00	9.0	300	65
G	1.20	13.00	20.00	8.0	280	60
J	1.20	13.00	20.00	7.0	260	60
K	1.20	13.00	20.00	6.0	240	55
L	1.20	13.00	2.00	5.0	200	50