An innovative, plaque-disclosing gel that identifies new, mature, and acid-producing biofilms. Spreads on easily and can be washed off without being runny or messy. A thin deposit of plaque will stain pink/red. Thick deposits of plaque will stain blue/purple. Areas that are light blue indicate acid production for the plaque bacteria, and the biofilm will have a pH of approximately 4.5 or lower.