CF4 is a medium weight, 100% cotton linter material (482 µm thickness at 53 kPA), suitable for use as a sample and absorption pad for lateral flow and flow-through assays.
CF7 is a thick, 100% cotton linter material (1873 µm thickness at 53 kPA), suitable for use as an absorption pad for lateral flow and for use in dipstick colorimetric assays.