A stage of wool preparation that follows scouring and precedes carding, in which burry wool is cleaned chemically: the scoured wool is steeped in sulfuric acid and baked, which turns burrs, seeds and other plant matter that washing leaves behind into brittle carbon. The charred residue is then crushed and shaken out, while the wool itself is largely spared. Some rug-trade descriptions of wool preparation use the word more loosely, for a washing stage between scouring and carding that leaves the fibers softer and whiter, one of the steps that turn freshly shorn fleece into clean wool ready to be carded, spun and dyed into rug yarn.
A wool-preparation step in which cleaned wool passes through a carding machine that lines the fibers up in one direction and removes any impurities still left. It follows scouring and carbonizing and comes before spinning, leaving the wool ready to be spun into yarn for the rug.
The first washing of raw wool after shearing, in which dirt and other impurities are removed from the fleece. It is one of the opening processes in preparing wool for Persian and Oriental rugs and is followed by carbonizing, carding and spinning into yarn.