Lotion which is temporarily colored upon application
First Claim
1. A composition for application to human skin, comprising a sunscreen formulation and a physiologically compatible color indicator, the color indicator being mixed with the sunscreen formulation to form a mixture that has a visible color when applied to the skin, and that has substantially no color when distributed evenly over the skin.
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Accused Products
Abstract
A lotion such as a sunscreen includes a pH indicator which colorizes the lotion until the lotion is applied to the human skin, whereinafter the colored lotion turns clear. A physiologically compatible pH indicator such as phenolphthalein is used which has a red appearance from pH 7.5+ and which has a clear appearance from about pH 7.0 to 7.5, the general pH range of the skin. The invention is suitable for use in any lotion, gel, mousse or medication that is best applied in an even and uniform manner to the skin. Accordingly, one preferred use of the invention is in UV-protecting sunscreens so that a user can ensure even distribution of the sunscreen on the body. In certain aspects of the invention, a cap houses the pH indicator and attaches to a container of the lotion, e.g., a sunscreen. The pH indicator mixes with the lotion as it is applied to the skin. The invention further provides methods of manufacturing sunscreens and the like with a pH indicator that turns substantially colorless upon prolonged contact with the skin.
39 Citations
14 Claims
- 1. A composition for application to human skin, comprising a sunscreen formulation and a physiologically compatible color indicator, the color indicator being mixed with the sunscreen formulation to form a mixture that has a visible color when applied to the skin, and that has substantially no color when distributed evenly over the skin.
- 9. In a method of forming a sunscreen formulation of the type comprising one of a lotion, gel, mousse, medication, cream, moisturizer, ointment, waxed base stick, aerosol, alcohol stick, oil, and mist, the improvement comprising the steps of providing a physiologically compatible color indicator and mixing the formulation with the color indicator so as to colorize the formulation for application to human skin.
- 13. A system for applying colorized lotion to human skin, comprising a lotion within a first container and a color indicator in a cap that connects to the first container, the cap having means for mixing the indicator with the lotion as a user ejects the lotion from the first container and through the cap.
Specification