Fine Persian carpets from Kerman in southern Iran, a city on the old Iran-India trade route and one of the historic rug-weaving centers, famed for its master dyers. Designs vary widely: florals and allovers, tree of lifeA design in which one large, elaborate tree rises through most of the field, surrounded by botanical ornament, with birds, animals and flowers spread among its branches. The tree can also occupy a single panel of a garden-panel rug or appear as a border pattern. In Persian tradition it stands for the connection between earth and the environment, is also read as a link between heaven and earth, and symbolizes strength, wisdom and the continuity of life. It is woven in Tabriz, Kashan, Isfahan, Kerman and Malayer rugs and in Baluchi rugs., hunting, garden and open-field layouts, fine “spring” florals of tiny flowers, and the distinctive “vase” technique. The pileThe surface of a rug or carpet, made of upright fibers in cut tufts or loops. In a hand-knotted rug it is formed by the cut ends of thousands of wool or silk knots tied onto the warp row by row, trimmed lightly during weaving and given its final height by shearing at finishing. Pile thickness, measured from the back of the rug to the top of the pile, typically runs from low, about 1/8 to 1/4 inch (3 to 6 mm), to high, about 1/2 to 5/8 inch (13 to 16 mm). Fine, dense designs are cut short to keep the pattern sharp; higher pile suits traffic and heavy furniture, lower pile suits door clearance and humid rooms. is usually soft kork woolA fine, soft grade of wool taken from the neck and inner fleece layer of young sheep, often from the first shearing. Oily with natural lanolin, it feels soft and resilient and gives colors extra shine. It is used for the pile of many fine city rugs from Isfahan, Kerman, Qum, Tabriz, and Mashad, and older antique Sarouks cut to a short pile use it too. Also spelled cork or kurk wool. on a cotton foundation, sometimes silk-and-woolA natural animal fiber used for the pile, and in some rugs also the foundation, of high-quality rugs. It is durable, resilient, stain resistant and flame resistant, feels soft and cushioned underfoot, insulates against cold, and takes up dye readily and holds it for many years. It also traps dust particles, which helps reduce allergic reactions. Quality depends above all on where the sheep graze: high-elevation pastures and good feed give thicker, oilier wool, with Manchester, New Zealand and Ghazni wools the best-known prized examples. Early-spring shearing and hand spinning (finer, softer thread than machine spinning) improve it further, while thin, dry wool from dead sheep goes into cheaper rugs. or pure silk. One rug can hold 15 to 30 colors, mostly deep reds, several blues, green and cream, with pastels such as champagne, lime green, pink and gray-blue in newer pieces. Roughly half of Kerman rugs, from lesser workshops, use the jufti knotA budget shortcut in hand-knotting in which each knot is looped around four warp threads instead of the two spanned by the symmetrical (Turkish) and asymmetrical (Persian) knots. It speeds up weaving but gives a much looser, sparser weave: a jufti rug can weigh about half as much as a regular-knotted rug of the same size, and its patterns look fuzzy, pixelated and less detailed, usually plain with open space. It is hard to spot from the back, so weight and pattern clarity are the best clues; the rugs wear less well and are cheaper. It turns up, for example, in lower-grade Kerman pieces., a shortcut yielding a sparser, lower-quality weave.