Denture cleaner having improved dissolution time and clarity and method of preparation

An improved effervescent cleansing composition in tablet form comprising:

• (a) about 20% to about 45% by weight of the final composition of an alkali metal or alkaline earth metal phosphate salt;
• (b) an improved perborate salt mixture wherein the improvement comprises a combination of anhydrous perborate and monohydrate perborate in the amount of about 50% to about 70% by weight of the total cleansing composition, wherein the combination includes at least 20% by weight of the total cleansing composition of anhydrous perborate, wherein the proportion of anhydrous to monohydrate perborate is from about 1 to 3 to about 3 to 1, said combination having a portion present in a compacted, granulated mixture with from about 0.01% to about 0.70% by weight of said combination of a polymeric fluorocarbon, said cleansing composition being capable of thoroughly cleansing stained surfaces within a soaking time of five minutes or less when dissolved in aqueous solution;
• (c) a sequestering agent in amounts of greater than about 10% by weight up to about 50% by weight of the composition, said sequestering agent being selected from the group consisting of phosphonic acid derivatives, carboxylic acid derivatives and mixtures thereof.