Rug canvas has a meshof strong, cotton threads. This type of canvas is made by twisting two warp threads around each other lengthwise, and locking them around two weft threads at regular intervals. This locking action is required to ensure that the threads cannot be separated and that they make a stable ground material.
Canvases come in different gauges, and rug canvas comes in 3.3 mesh and 5 mesh sizes. The higher the number of holes per unit of measurement, the more suitable the canvas is for detailed work.
Digital source of illustration (retrieved 26 June 2016).
GVE