After the weaving and trimming operations have been completed, the carpet is washed. The purpose of washing is to clean and enhance the natural lustre of wool and these are achieved through removing surface dirt and excess dye and looseing and straightening the pile by the chemical and physical action applied during the washing process. Carpets can be washed in two ways: (a) simple soap and water washing and (b) chemical washing. Washing with the chemicals gives a better washing effect than an ordinary washing.

Until the late 1980s, refined carpet washing was done only in Europe. As Tibetan carpet production increased, however, European facilities became overburdened, resulting in considerable delays in timely delivery. Moreover, the refined but costly washing process in Europe gradually became highly questionable with respect to the real value of the carpets. Consequently, carpet washing was introducing to Nepal.

Once the Nepal Tibetan carpet is complete, it is removed from the loom and put on a flat surface. Then Tibetan rugs and carpets is trimmed or clipped with the help of the scissors. There are basically, two objectives of the clipping, one is to maintain uniform length of the pile and the second is to distinctly curve out the motifs embodied in the design. To maintain the pile length the Nepal carpet is given flat trimming or clipping throughout the carpet body, whereas to make the patterns distinct each pattern is individually clipped. But in both the cases. Very serious care has to be given, otherwise the look or the appealing effect of the carpet may be ruined and best design red carpet discarded.

As the Nepalese Tibetan carpets and rugs is a pile carpet and knotting the pile yarn in the warp makes the pile, the method of carpet weaving or making is also known as knotting. The warping is complete. In warping, the warp yarn, cotton or silk, is put around the beams, over and under the cross-sticks and in U-turns round the warp lock- stick. The warp yarns are put on the loom after asserting the length of the warp, which depends on the size of the carpet that is to be made. When the warping is complete, the warp lock-stick is pushed down to the bottom of the frame with the two cross-sticks above showing the alternative warp threads. For one set of the warp threads a loop heddle is made, the other cross-stick is replaced with a flat shed stick. Some carpet weavers make a loop heddle for each shed, and in this case the two heddle rods are tied to a heddle horse which rests on a  raised bar fixed above the frame: the heddle horse, like a seesaw, is pushed backwards and forwards over the bar, thus tipping up and down and lifting each heddle alternatively.

There are two methods of wool dyeing: the traditional and the modern. The traditional method, which is also known as pot dyeing, is a method in which a pot, made of copper or aluminum, but usually of copper, is used. The maximum quantity that can be dyed by traditional method is twenty-five kilograms. In this process, the yarn is dyed on fire using firewood and bamboo or wooden rods are used for stirring the yarn. This process is completely manually handled, included, including temperature control of the dyeing pot.

The modern method, which is machine operated, is a closed dyeing method. The dyeing vessels or pots or chambers, are made of steel. Some machine dyeing methods are fully automat zed. The functions, like in and outflow of water, stirring, temperature controlled are all automatic. The required steam is generated either by using diesel or rice husk. In the machine dyeing process, computerized dyeing is also being invented and used, where every function is computerized including the recipe of the color.