A Filter Fabric is produced from short staple fibres, invariably possess surfaces with protruding fibre ends. Since such protrusions may inhibit the cake release by clinging to the dust, it is a common practice to remove them. It is placed in the flow path, and trapping is provided by the three mechanisms described in the introduction to this section. Filter fabric is designed to allow water to flow thru but retain sand, sedimentation materials , soils, etc. that are in the water.