When rugs are injured they should be promptly repaired and by the most highly skilled professional. If the web wears off at the end or at the selvage at the side, so that the adjacent knots of the pile loosen and begin to pull out, the missing knots should be promptly restored and the missing web replaced, and the pile carefully sewn down all around the outside of the rug to prevent ravelling. Obstinate inkstains are removed only by slipping the pile of the rug down flat to the web and carefully pulling out the knots from the back of the rug and inserting new knots.
It often happens that rugs must be cut down to fit rooms or spaces for which they are too large, or badly injured sections must be replaced or cut out. This is work that can be successfully done only by those experienced in the weaving of rugs. They must also have the suitable materials, not only yarns of similar wool, but yarns that match in color, and when the rug is an old one it is often difficult in modern wools to make an exact match.
It is perhaps needless to say that the wools employed for mending should be vegetable dyed. In sewing together the parts of a rug that have been cut down it is customary to employ black linen thread waxed. In repairing a hole, where web as well as pile is gone, the first step is to insert new warp threads, sewing them far back into the rug above and below. Then new knots are tied and new filling threads inserted, repeating the process that was employed in the first weaving.
4. Mending an Oriental rug.