Abstract: The invention describes uses of various acid-base indicators in combination with consumer products, such as herbicides, where upon application the surface treated is visualized by color and then, with time, the color disappears.

Abstract: The invention describes compositions that can indicate whether hands have been washed for an approximate predetermined period of time. The composition includes an acid-base indicator and a delivery system.

Abstract: Compositions and methods for producing novel paints, bubbles, markers and cosmetics are described.

Abstract: The invention describes color changing toothpastes and mouthwashes which contains acid-base indicator(s) for interaction with the oral cavity to provide a color change indicative of treatment time.

Abstract: The invention describes a composition for use in disinfecting a surface for personal use, such as a public restroom facility or telephone. The composition and delivery of the composition provides for the placement of a thin layer of disinfectant which includes a acid-base indicator. The acid-base indicator disappears as the thin layer effects the germicidal activity of the disinfectant. The composition is also rapidly drying, so that the acid-base indicator disappears as well as the disinfecting composition leaving the surface dry. The invention also relates to use of the compositions in a lotion, such as a sunscreen. Use of the acid-base indicator provides a method to visualize where the lotion is applied by color, with the color then later dissipating.