Single phase color change agents
First Claim
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1. A liquid cleansing formulation comprising:
- a base material, the base material comprising water and a surfactant;
a reducing agent, wherein the reducing agent includes a sugar; and
a redox dye, wherein the ratio of the reducing agent to the redox dye is at least about 5 to 1 and wherein the redox dye is present in the cleansing formulation in an amount of from about 0.001 to about 0.5 weight percent and the reducing agent is present in the cleansing formulation in an amount of from about 0.1 to about 2.0 weight percent;
wherein exposure of the liquid cleansing formulation to an excess concentration of oxygen causes oxidation of the redox dye and produces an observable color change.
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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
19 Claims
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1. A liquid cleansing formulation comprising:
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a base material, the base material comprising water and a surfactant; a reducing agent, wherein the reducing agent includes a sugar; and a redox dye, wherein the ratio of the reducing agent to the redox dye is at least about 5 to 1 and wherein the redox dye is present in the cleansing formulation in an amount of from about 0.001 to about 0.5 weight percent and the reducing agent is present in the cleansing formulation in an amount of from about 0.1 to about 2.0 weight percent; wherein exposure of the liquid cleansing formulation to an excess concentration of oxygen causes oxidation of the redox dye and produces an observable color change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification