Rug Quality Knots Per Square Inch

Knots per square inch explained how knots per inch is counted.

Rug quality knots per square inch. Individual knots are counted 1 vertically and 1 horizontally then multiplied together to arrive at the knots per square inch. 16 18 quality is a fine quality 12 12 a lower quality. It is obtained by counting the knots on the backside of the carpet 10 cm in the direction of the warp and 10 cm in the direction of the weft. Indian rugs are measured in terms of warps per inch by wefts per 10 cm.

Persian rugs are based on a unit of measure called raj or about 7 cm. Below is a basic chart converting raj to knots per square inch. Different varieties of oriental rugs use different types of knotting techniques as well as different knots per square inch which ultimately determine the quality of the finished product. Kpsi is one of many ways rug experts may evaluate oriental rugs.

A 12x12 rug would have 144 kpsi. 5 40 9 54 12 60 14 70. The knot density is the number of knots per square metre. However because of the time it takes for the artisan to individually wrap every knot and the amount of wool used in the process knot count per square inch kspi is one of the largest determinants of value.

This term refers to the number of knots that are packed into an area of 1 sq. More knots compressed into a square inch not just increase the intricacy and clarity of the design it increases the durability of the rug as the knots are closely packed. Kpsi is also sometimes referred to as knot density and knot count which is somewhat of a quick simplification of what can be a complex equation of. The main measurement is kpsi knots per square inch similar to the pixels on a tv or computer screen the more pixel or knots the clearer and sharper the image.

A quick and easy way to get a close approximation is to throw a us quarter down on the rug. Just like thread count on sheets the best hand knotted rugs can start out at 50 kspi and can reach over 1000. Most but not all of the best rugs have a square knot construction or the same number of knots in both width and length. Knot density is a traditional measure for quality of handmade or knotted pile carpets it refers to the number of knots or knot count per unit of surface area typically either per square inch kpsi or per square centimeter kpsc but also per decimeter or meter kpsd or kpsm number of knots per unit area is directly proportional to the quality of carpet.

New chinese rugs are measured in lines warps per 10 cm. To accommodate for more knots finer material may also be used like silk or thinner yarn which increase the quality of the rug by the material used to create it. Inch of the rug. This is typically measured by counting the knots on the back of a rug across a vertical and horizontal inch and multiplying the two numbers.