A non-woven fabric to be used in a disposable absorbent article is disclosed, to which a formula is added during its manufacturing process, either to change its affinity to water and/or to provide same with any desired characteristic, said formula containing an indicator means such that the formula can be detected along the entire length and width of the fabric during the manufacturing process thereof, without the need of carrying out laboratory tests. The indicator means can be an optical indicator, a thermal indicator or a coloring agent.
