TECHNICAL SHEET(STANDARD:GB3778-2003 & ASTM-STANDARD)
Item	Unit	Grade	N220	N234	N330	N326	N339	N375	N550	N660
Iodine Adsorption Number	g/Kg	superior	121±5	120±5	82±5	82±5	90±5	90±5	43±4	36±4
		Qualified	121±7	120±7	82±7	82±7	90±7	90±7	43±6	36±6
DBP Absorption Number	10 -5 m 3 /kg	superior	114±5	125±5	102±5	72±5	120±5	114±5	121±5	90±5
		Qualified	114±7	125±7	102±7	72±7	120±7	114±7	121±7	90±7
Compressed   DBP Absorption Number	10 -5 m 3 /kg		93~103	97~107	83~93	64~72	94~104	91~101	80~90	69~79
		Qualified	90~106	94~110	80~96	62~74	91~107	88~104	77~93	66~82
CTAB Surface Area	10 3 m 2 /kg	superior	105~117	113~125	76~88	77~89	87~99	90~102	37~47	31~41
		Qualified	102~120	110~128	73~91	74~92	84~102	87~105	35~49	29~43
Nitrogen Surface Area	10 3 m 2 /Kg	superior	114~124	114~124	73~83	73~83	86~96	88~98	34~44	31~39
		Qualified	112~126	112~126	71~85	71~85	84~98	86~100	34~46	29~41
STSA	10 3 m 2 /Kg	superior	106±5	112±5	75±5	76±5	88±5	91±5	39±5	34±5
		Qualified	106±9	112±9	75±9	76±9	88±9	91±9	39±9	34±9
Tint strength	%	superior	111~121	118~128	99~109	106~116	106~116	109~119	¬	¬
		Qualified	108~124	115~131	96~112	103~119	103~119	106~122	¬	¬
PH Value		Qualified	7±1.5
Heating Loss	%≤	Qualified	2.5						1.5
Ash Content	% ≤	Qualified	0.7
45 um mesh	%  ≤	superior	0.05
		Qualified	0.10
Impurity		Qualified	NO
Fines Content	%≤	Qualified	7
Toluene Discoloration	% max 1618	Qualified	90						85	80
sulfur	% max 1619	Qualified	1.1		1.5	1.1
Pour density	kg/m3	Qualified	355±40	320±40	380±40	455±40	345±40	345±40	360±40	440±40
Modulus at 300%	Mpa	superior	-2.3±1.0	-0.4±1.0	-0.9±1.0	-3.9±1.0	0.6±1.0	0.1±1.0	-0.9±1.0	-2.6±1.0
		Qualified	-2.3±1.6	-0.4±1.6	-0.9±1.6	-3.9±1.6	0.6±1.6	0.1±1.6	-0.