Knotting is the most time taking and most comprehensive part of the whole production process of a carpet. A trained weaver makes up to 7000 knots a day which is equivalent to about 1 m² /month in standard quality (9). If the design is complicated it may need more time - and if it is simple it may take less time to knot one square meter. Especially for accurate knotting of individual designs various abilities of the weavers are required; therefore the craftsman has to be able to knot a particular design. The technique of knotting remained unchanged since centuries: every thread is knotted in to the stretched warp on the loom and the weaver has to read the exact position and color of each knot from the knot plan (patron). Then a transverse thread is beaten with the rake into the row of knots to give the weft the necessary firmness. That more shading in a design the longer the weaver needs to produce a certain area of the carpet. Weaving your design begins once the carpet design is completed and the knotting plan produced. As soon a carpet is completed and taken of the loom a new warp for a new carpet is stretched according to the quality required for a certain design. The vertical threads, ending in the fringes on the two sides of the carpet are called the "warp" and it can be made of cotton, wool or silk; in my caropets cotton is used as standard because it gives the carpet best solidity.

There are different types of looms and different types of knots but for digital designed carpets the "double knots" is used because these knotis mathematically a square respectively like a pixel; that’s essential for the calculations of the designer. There are much more interesting technical details about the weaving but this knowledge goes beyond designers needs; who ever is more interested can make studies in a wide range of literature.