Description

China A4 Paper Suppliers OEM A Grade Printing Manufacturers typek A4 Paper aone Papers For Office

Product Paramenters

Items	Unit	Test Method	Standard
Items	Unit	Test Method	70gsm	75gsm	80gsm
Grammage	g/m2	GB/T451.2 ISO536	70±2.5	75±3.0	80±3.0
Thickness	μm	GB/T451.3 ISO534	100±4	104±4	110±4
CobbTop/Back(60s)	g/m2	GB/T1540 ISO535	≤35.0
Brightness (D65)	%	GB/T7974 ISO2470	103.0±3.0
CIE Whiteness	%	GB/T22880 ISO11475	160.0±5.0
Opacity	%	GB/T1543 ISO2471	≥90.0	≥90.0	≥91.0
BEKK Smoothness	S	GB/T456 ISO5627	≥30.0
Moisture	%	GB/T462 ISO287	4.0±1.0
Tensile index	N.m/g	GB/T12914 ISO1924	≥45.0
Temperature: (23±1)℃ Relative Humidity: (50±2)%RH
Product Characteristics: 1、All wood pulp and neutral paper,which selected high-quality pulp. 2、High brightness,Good stiffness. 3、Beautiful colorpaper, writing are clearly&smooth. 4、Not easy to jam,Suitable for all kinds of high,medium and low speed printing copiers. 5、This standard is on trial and will be optimized after PM8 paper machine runs normally.