Count Knots in a Persian Rug: Discover Knot Density and KPSI Secrets
To count knots in a Persian rug, look at the back. Measure one vertical inch and one horizontal inch. Count the knots in each direction and multiply these counts together. For example, a 12×12 rug could have 144 knots per square inch (KPSI). Fine rugs often show counts like 20/20, indicating high quality and knot … Read more