A method for manufacturing a water-soluble laundry detergent sheet, the method comprising, consisting essentially of or consisting of the steps: (i) providing an aqueous liquid, preferably homogenous, composition comprising, consisting essentially of or consisting of the following components: (a) zinc diricinoleate, (b) at least one surfactant, (c) at least one water-soluble polymer, (d) at least one washing booster, wherein said washing booster is selected from polyalkyleneimines and optionally further comprises enzymes, (e) optionally at least one perfume component, and (f) optionally at least one adjunct detergent ingredient; (ii) applying the composition of step (i) onto a surface such that it forms a layer on said surface; (iii) drying said layer to obtain a laundry detergent sheet; and (iv) optionally cutting the laundry detergent sheet into pieces of a desired shape and size; and (v) optionally packaging one or more laundry detergent sheets obtained in step (iv), wherein the zinc diricinoleate preferably is contained in the composition in amounts of from 0.001 to 20 wt.-%, preferably in 0.1 to 10 wt.-%, based on the total weight of the composition, wherein the composition optionally further comprises at least one profragrance compound selected from the group consisting of silicic acid fragrances, oxazolidine of fragrances, β-thio carbonyl profragrances and mixtures thereof and preferably is contained in the composition in amounts of from 0.001 to 10 wt.-%, preferably in 0.1 to 5 wt.-%, based on the total weight of the composition. (i) providing an aqueous liquid, preferably homogenous, composition comprising, consisting essentially of or consisting of the following components: (a) zinc diricinoleate, (b) at least one surfactant, (c) at least one water-soluble polymer, (d) at least one washing booster, wherein said washing booster is selected from polyalkyleneimines and optionally further comprises enzymes, (e) optionally at least one perfume component, and (f) optionally at least one adjunct detergent ingredient; (a) zinc diricinoleate, (b) at least one surfactant, (c) at least one water-soluble polymer, (d) at least one washing booster, wherein said washing booster is selected from polyalkyleneimines and optionally further comprises enzymes, (e) optionally at least one perfume component, and (f) optionally at least one adjunct detergent ingredient; (ii) applying the composition of step (i) onto a surface such that it forms a layer on said surface; (iii) drying said layer to obtain a laundry detergent sheet; and (iv) optionally cutting the laundry detergent sheet into pieces of a desired shape and size; and (v) optionally packaging one or more laundry detergent sheets obtained in step (iv), wherein the zinc diricinoleate preferably is contained in the composition in amounts of from 0.001 to 20 wt.-%, preferably in 0.1 to 10 wt.-%, based on the total weight of the composition, wherein the composition optionally further comprises at least one profragrance compound selected from the group consisting of silicic acid fragrances, oxazolidine of fragrances, β-thio carbonyl profragrances and mixtures thereof and preferably is contained in the composition in amounts of from 0.001 to 10 wt.-%, preferably in 0.1 to 5 wt.-%, based on the total weight of the composition.