Single Phase Color Change Agents
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Accused Products
Abstract
There is provided a color change composition that remains stable in a single phase and that contains an indicator that produces an observable color change after a period of time to show that sufficient cleaning has been done or to indicate the thoroughness of the cleaning. This use indicating color change is useful for, for example, in soap for teaching children to wash their hands for a sufficient period of time. This composition may be added to many different base materials to indicate time of use or as a way to introduce enjoyment to the activity.
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Citations
59 Claims
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1-37. -37. (canceled)
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38. A color change system comprising:
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a dispenser having a storage chamber and a dispenser opening in liquid communication with the storage chamber; and a liquid cleaning formulation within the storage chamber, wherein the liquid cleansing formulation comprises a base material, reducing agent, and redox dye, wherein the ratio of the reducing agent to the redox dye is at least about 5 to 1, and wherein exposure of the liquid cleansing formulation to an excess concentration of oxygen after being dispensed from the storage chamber causes oxidation of the redox dye and produces an observable color change. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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Specification