01/03/2018
The Making of an Oriental Rug
Dyes:
The natural dyes in an Oriental rug are derived from plant materials and insects such as indigo, madder, oak, sumac, pomegranate, cochineal and larkspur. Before the 1870s, they were the only source used to dye wool. Since the invention of synthetic dyes, there has been much debate about which type of dye produces a more beautiful and investment-worthy rug. Natural dyes tend to gently fade with time and therefore produce a much sought after patina.
Weaves and knots:
Most consumers know about "counting knots" to judge if the rug they are considering is of a high quality. Below you will find procedures to counting knots, but please be advised...The simple counting of knots is not a true test, but a guideline. The actual knot count needs to take into consideration the material used in the individual rug. Example: It is much more likely to accumulate an extreme knot count when the material used is silk, where as if you were to come across a rug woven from a thick wool, such as an antique Heriz, your count will be much lower than the silk, but the value of the carpet could run near $35 - $75,000.00.
A consumer needs to take into count the entire carpet, the design, the dyes, the material used, as well as the emotional value they receive from a rug. If you purchase your carpet from a reputable dealer, then the only thing the average consumer need to know is if they appreciate the appearance of the carpet and if the carpet fits into their budget.
Knot density (knots per square inch) is an important indicator of rug quality. Most weaves are measured simply by counting the number of knots per linear inch along the warp (i.e., along the length of the rug) and the number of knots per linear inch along the weft (across the width of the rug) and multiplying to get the number of knots per square inch (or per sq. cm.). Unfortunately, this simple concept can be tricky to apply in practice.
How do you know when to count one bump on the back of the rug as one knot? It's easy... Look carefully at the individual areas of color across the width of the back of the rug. If you only see colored elements in pairs, you need to count each pair as one knot. If you see lots of single colored elements, the rug has offset warps and each element should be counted as one knot. Many country rugs from Turkey, Afghanistan, and Iran show both knot elements on the back of the rug, as do Bokharas from Pakistan. Most rugs from India and China have strongly offset warps, and so show only one knot element on the back of the rug.
In the Varanasi area of India, rugs are graded using two numbers, like "5/40," "9/60," or "12/60." The first number represents the knots in 9/10 of an inch of the rug's width. The second number represents the knots in 4 1/2 inches of the rug's length. 0.9" x 4.5" equals 4.05", almost four square inches, so an easy conversion is to multiply the two numbers together and divide by 4 (sq. in.) to get the approximate weave in knots per sq. in. For example, with a "9/60" quality rug, 9 X 60=540 and 540/4=135 knots per sq. in. Note that most rugs from India have strongly offset warps, so you will only see one element of the knot on the back of the rug.
In Pakistan, indicated qualities like "16/16" or "16/18" for rugs in Persian design represent the number of knots per linear inch across the warp and weft counted in the normal way. For example, a "16/18" quality Kashan has 16 X 18 weave, or about 288 knots per sq. in. Note that these rugs have strongly offset warps, so you will only see one element of the knot on the back of the rug.
So-called "double" Bokharas from Pakistan in qualities like "9/18," "10/20," "11/22," and "12/24" are different. In this type of rug, warps lie side-by-side and are not offset, so both elements of the knot show on the back of the rug. Be sure not to double-count the weave across the width when examining a Bokhara.
China uses a completely different nomenclature, with "line counts" like "70 line," "90 line," or "120 line." The line count equals the number of knots in a linear foot measured across the width of the rug. Thus a "90 line" rug has 90 knots per linear foot across its width. A "90 line" Chinese rug has about 56 knots per sq. in.; a "SINO-PERSIAN" (a Chinese rug in Persian design) in "160 line" quality has about 177 knots per sq. in.; a "240 line" rug has about 400 knots per sq. in. Chinese rugs have strongly offset warps, so you will only see one element of the knot on the back of the rug.
