This standard specifies the test methods for the warp density and latitude of hand-knotted carpet tufts. This standard applies to hand-knotted carpets, and hand-tufted carpets can also be used as a reference.
GB/T 15964-1995 history
2008GB/T 15964-2008 Carpets.Determination of number of tufts or loops per unit length and per unit area
1995GB/T 15964-1995 Hand-knotted carpets--Determination of number of tufts per unit length