| Scope | This international standard specifies three methods (liquid-displacement, sink/float and density gradient column) for the determination of the density of desized carbon fibre yarn. The determination of density may also be carried out on sized fibre by agreement between customer and supplier. At low levels of size (less than 1%), the density obtained with sized fibre may be taken to be identical to that of unsized fibre. Method C (density-gradient column) is the reference method. |