| abstract |
PCT No. PCT/GB91/01081 Sec. 371 Date Feb. 19, 1992 Sec. 102(e) Date Feb. 19, 1992 PCT Filed Jul. 3, 1991 PCT Pub. No. WO92/01115 PCT Pub. Date Jan. 23, 1993.A method of enhancing the whiteness of a cellulosic material is described which comprises incorporating therein, or applying thereto, a fluorescent whitening agent, a water soluble phosphonate having 1 to 5 phosphonate groups and/or a water soluble carboxylate having 2 to 5 carboxylate groups at a neutral or alkaline pH. |