| abstract |
There is provided a bleaching composition containing (a) an oxygen-releasing bleaching agent as a source of available oxygen; and (b) a non-paraffin oil organic silver coating agent In one aspect the rate of release of available oxygen is carefully controlled such that the available oxygen is completely released from the composition in a time interval of from 3.5 minutes to 10.0 minutes. In another aspect the composition contains (c) an additional corrosion inhibitor compound. Component (b) forms a coating on silverware in the wash cycle, to prevent it becoming tarnished by the bleach. Suitable materials are fatty esters, paraffin wax, animal and vegetable oils, polymers such as PVP, gelatine, alginates, fatty dialkylamine oxides, cellulose derivatives. Benzotriazole is the preferred corrosion inhibitor. |