Check the listing for details. Plak Smacker Plaque Disclosing Tablets set of 4, Total 40 Tablets. Color: Purple, Condition: New. Listed at 12.89 USD. Make sure you get your mouth completely clean with PlakSmacker Plaque Disclosing Tablets. They turn deposits to a different color so you can see where you need to brush a second time. Each brushing tablet comes individually wrapped so you can take one or two with you wherever you go. These tablets are fast and easy to use so you can finish your oral hygiene routine in just minutes. This product can catch remaining plaque that both brushing and flossing can miss. The purple color stands out against the natural shades of human teeth for easy visibility. Directions: 1. Chew one tablet. 2. Wipe teeth with tongue. 3. Rinse mouth. Expectorate. Old plaque will stain blue. New plaque will stain red. 4. Brush and floss teeth thoroughly to remove all stain.