Patent ID: 7732392

Claim:
A soap bar comprising at least two different portions A and B, wherein the portions have a difference in solubility of at least about 1.0%, and wherein the differences in solubilities between the at least two different portions causes a ridged structure to be formed upon use of the bar, wherein I) Portion A is the lesser soluble portion and comprises: (a) about 75-90 weight % of a soap; (b) about 1-5 weight % of one or more of a C 12 -C 20 straight or branched chain fatty acids; (c) about 0.5-1.2 weight % of at least one hardening agent chosen from inorganic electrolytes, propylene glycol, mixtures of sodium chloride with polyethylene glycol, and mixtures of sodium chloride with at least one wax with a melting point of 40-60° C., wherein a total amount of all of these materials in Portion A are within the about 0.5-1.2 weight % range; (d) water; and II) Portion B is more soluble than Portion A in water and comprises: (a) 60-75 weight % of a soap; (b) a solubility enhancing component selected from the group consisting of (i) 6-10 weight % of a humectant; (ii) 3-10 weight % of an alcohol; (iii) 0.5-10% of a saccharide humectant; (iv) 0.5-25 weight % of a non-soap synthetic surfactant; and (v) mixtures thereof; provided that the solubility enhancing components must be present in a minimum amount of at least about 5 weight %; (c) about 0.5-1.7 weight % of at least one hardening agent chosen from inorganic electrolytes, propylene glycol, a mixture of sodium chloride with polyethylene glycol, a mixture of sodium chloride and a wax with a melting point of 40-60° C., wherein a total amount of all of these materials in Portion B are within the about 0.5-1.7 weight % range; (d) about 0.1-5 weight % of one or more of a C 12 -C 20 straight or branched chain fatty acid; (e) water, and wherein the portions have a difference in solubility of between 3-7% and height difference between the ridges of at least two portions is about 0.1 to about 0.6 mm.