cellulose 100 5 ground beech fibers and the nfc 8 and 9 papers were composed of 100 wt asa treated nanofibrillated cellulose 100 5 ground beech fibers amount of asa 2 wt the raw nfc 100 5 was obtained from rettenmaier amp sohne gmbh germany no other additives pigments wood fibers have been used for those nfc films were contained in the samples tested for film formation suspensions of nfc and asa nfc respectively were prepared in water or ethanol with concentrations in the range of 0 2 1 wt the suspensions were homogenized by using a waring 38 bl40 laboratory blender subsequently the sheets were formed in a b u00fcchner funnel by filtration under reduced pressure the obtained wet nfc sheets were dried at 50 u00b0 c between glass plates in a memmert 400 drying oven as can be seen from table 3 ethanol based suspensions nfc 5 nfc 9 resulted in thicker more bulky brighter and more opaque papers than the comparison papers manufactured from water based suspensions nfc 2 nfc 8 also other properties measured indicate that such papers have the potential of being widely used in similar applications as conventional copy papers the pore size distributions of.