ORIENTAL RUG TERMINOLOGY

Warps are the parallel strings stretched from loom beam to loom beam upon which rows of knots are tied. Most weavers use cotton for warp material if it is available because it is easier to weave a flat, straight rug on cotton warps than on wool warps (wool yarn is more elastic than cotton string, and is more affected by changes in humidity). Weavers who are semi-nomadic pastoralists (i.e. not farmers) are much more likely to use wool than cotton for warp and weft.

Wefts run across the width of the rug, over and under the warp strings and between rows of knots. Most often wefts are made of cotton, wool, or silk . Wefts help hold rows of knots in place and strengthen the structure of the rug.

Knots are tied by looping yarn around pairs of warps and cutting off the standing end. The ends of the "knot" become the pile or nap of the rug.

Edge bindings are made by wrapping several warps at the edge of the rug with yarn to reinforce this part of the rug.

End finishes hold knots and wefts from working off the rug's warp strings. Many rug types have a flat-woven kilim selvedge at both ends.

Fringes are formed by gathering and knotting together bundles of warp strings at both ends of the rug after the rug has been cut from the loom. The knots in these bundles of warp strings keep pile knots and end finishes tight at the rug's ends.

(this information is curtesy of Jacobsen rugs)