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For comparison: 100,000/square meter = 1,000/square decimeter = 65/square inch = 179/gereh. For two carpets of the same age, origin, condition and design, the one with the higher number of knots will be the more valuable. Knot density is normally measured in knots per square inch (KPSI) which is simply the number of vertical knots across one ...
Interface was founded in 1973 by Ray Anderson, whose decade and a half in the carpet trade had led him to create one of the first U.S. manufacturers of carpet tiles, also known as modular carpet or carpet squares. Carpet tiles, which originated in Europe, became highly popular during the 1980s as an alternative to broadloom carpet, especially ...
The quality of a carpet is usually measured in face weight, or how many fibers there are per square inch. The higher the face weight the more plush a carpet will feel. [3] Carpets come in a variety of materials including wool, nylon, olefin, and polyester. There are different types of carpet like twists, which is commonly referred to as berber.
Carpet tiles are also available, typically 50 centimetres (20 in) square. These are usually only used in commercial settings and are affixed using a special pressure-sensitive glue, which holds them into place while allowing easy removal (in an office environment, for example) or allowing rearrangement in order to spread wear.
A tiling with rectangles is a tiling which uses rectangles as its parts. The domino tilings are tilings with rectangles of 1 × 2 side ratio. The tilings with straight polyominoes of shapes such as 1 × 3, 1 × 4 and tilings with polyominoes of shapes such as 2 × 3 fall also into this category.
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