It is made from 100% Unbleached sulphate wood-pulp. Cardboard makes which on the intermittent type board machine .Its characteristic is: Material free of strain,very flat , thickness even, the surface smooth, the mechanical strength high, has the obdurability and the electric insulation . Used in oil-cooled power transformers and distribution transformers primarily due to their high purity, mechanical strength and optimal oil-impregnability. The components formed of pressboard, such as angle rings, snout segments and end leads, enable an exact adaptation to the electric field conditions prevailing in the transformer. Pack :sheet size：1000X2000mm、1400X1100mm、1400X2000mm， Color:red ,green,Nature Thickness：0.10，0.13，0.18，0.25，0.38，0.50，0.80,1.00，1.60，2.00，2.50，3.00．4.00mm
PI2(Coil Insulating Paper Class2):Thickness 0.03，0.04，0.05，0.06，0.075，0.08，0.09，0.10，0.13，0.18，0.25，0.38mm
Heat Resistant Papert for Insulating "HPI-Green":Thickness 0.05 , 0.075 , 0.08mm
Special sizes and thicknesses upon request ， process insulation compenents for construction part and Hand-moulded special shape Components as:End Ring ，Clamping Ring ,Bushing,Tubes,Fan-angle,insulating Angle Caps etcs.products through ISO 9001.UL,SGS certification.