Art paper and duplex board|067

Item	Unit	Standard
		Low wetstrength	Medium wetstrength	High wetstrength
1.Basis weight	g/m2	80 90 100 105 110 115 120
2.Basis weight tolerance≤	%	±4.0	±4.0	±4.0
3.Basis weight cross direction tolerance≤	%	3.0	3.0	3.0
4.Brightness? ≥	%	88.0	80.0	80.0
5.Opacity ≥	%	87.0	86.0	86.0
6.Gloss ≥	%	60	63	63
7.Smoothness ≥	s	600	600	1000
8.Printing gloss≥	%	85	85	85
9.Ink receptivity	%	15-25	15-25	13-20
10.Dry tensile strength≥	N/15mm	MD 45 CD 25	MD 50 CD 30	MD 55 CD 35
11.Wet tensile strength ≥	N/15mm	—— ——	MD 15 CD 9	MD 17 CD 10
12. Printing surface strength ≥Viscosity of ink medium ≥Viscosity of ink lower	m/s	1.2 4.0	1.2 4.0	1.2 4.0
13.Osmosis ≥	s	15	20	30
14.cobb≤	g/m2	——	18	15
15.Anti-alkali≥	min	——	——	20
16.Moisture	%	5.0±1.0	5.0±1.0	5.0±1.0