There are quite a few distinctive qualities of Nepalese – Tibetan Carpets, which are generally identified by the density of knots. The major productions is in 60 knots quality but demand for 80 knots, 100 knots, & above 100 knots quality are rising. A universal density of 70,000 knots/ m2 and 3.80 kgs weight in 60 knots quality carpets was the standard upto early seventies. But the introduction of strong wash and market demand in Europe, led the manufacturers to change their product to beet thick pile product.
The present day quality of Nepalese- Tibetan carpet of knot of 60 knots would have a density of 56,000/m2+and the weight ranges from 4.5 to 5.0 kgs., where as in 80 knots would have 80,000 + with a weights is 3.5 to 4.25 kgs and in 100 knots the density would be 1,25,000+& the weight varies form 2.5 to 3.5 kgs.