Laundry treatment for fabrics

A method of improving perfume deposition onto fabrics in a laundry treatment process and/or improving retention of perfume on laundered fabrics, comprising using a laundry treatment composition comprising a water-soluble or water-dispersible rebuild agent for deposition onto a fabric during the laundry treatment process wherein the rebuild agent undergoes during the laundry process, a chemical change by which change the affinity of the rebuild agent for the fabric is increased, the chemical change occurring in or to a group or groups covalently bonded to be pendant on a polymeric backbone of the rebuild agent and which backbone comprises cellulose units or other β-1,4 linked polysaccharide units, the average degree of substitution of the total of all groups pendant on the saccharide rings of the backbone being from 0.3 to 3, preferably from 0.4 to 1, more preferably from 0.5 to 0.75, most preferably from 0.6 to 0.7.