Dishwashing method
AssigneeThe Procter & Gamble Company
InventorsClaire Appleby, Graeme Duncan Cruickshank, Lynda Anne Jones
Life of this patent
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Abstract
There is provided the use of a cellulose ether material to inhibit the transfer of a colored food soil from an aqueous wash solution to a substrate in a dishwashing method.
Claims25
A method for inhibiting the transfer of colored food soil from an aqueous wash solution to a substrate, comprising the step of washing the substrate with a dishwashing composition comprising an amount of cellulose ether such that the cellulose ether is present in the aqueous wash solution at a level of from between 0.0001% to 0.1% and 0.005% to 20% by weight of a water-soluble bismuth compound.
A method for inhibiting the transfer of colored food soil from an aqueous wash solution to a substrate, comprising the step of washing the substrate with a dishwashing composition comprising:
- (a) an amount of cellulose ether such that the cellulose ether is present in the aqueous wash solution at a level of from between 0.0001% and 0.1%;
- (b) a hydrogen peroxide source;
- (c) a member selected from the group consisting of organic peroxyacid bleach precursors, pre-formed organic peroxyacids, and mixtures thereof;
- and
- (d) 0.005% to 20% by weight, of a water-soluble bismuth compound selected from the group consisting of bismuth trihalides, bismuth nitrate, bismuth phosphate, complexes of bismuth acetate with an organic counter anion, complexes of bismuth citrate with an organic counter anion, and mixtures thereof.
A method for inhibiting the transfer of colored food soil from an aqueous wash solution to a substrate, comprising the step of washing the substrate with a dishwashing composition comprising:
- (a) cellulose ether in an amount such that the cellulose ether is present in the aqueous wash solution at a level of from between 0.0001% to 1%;
- (b) from 5% to 25%, by weight, inorganic perhydrate salt;
- (c) from 0.01% to 5%, by weight, water-soluble bismuth compound;
- and
- (d) from 1% to 5%, by weight, surfactant.
Dependencies are inferred from the claim text.