Dyes and methods of selecting dyes for use in personal care products
AssigneeThe Dial Corporation
InventorCatherine Schmit
Life of this patent
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Abstract
Dyes and methods of selecting dyes for use in personal care products are provided. An exemplary method includes selecting a dye concentration of a dye that is brightly or intensely colored, determining a dye concentration of the dye that does not change the color of skin or minimally changes the color of skin, and determining a dye concentration of the dye that does not transfer color or minimally transfers color. An exemplary dye includes, by weight percent of the personal care product in which such dye is provided, approximately 0.001500% Red 33 dye and 0.003750% Orange 4 dye.
Claims20
A method for selecting a dye for use in a personal care product, comprising:
- selecting a dye concentration of a dye that is brightly or intensely colored;
- determining a dye concentration of the dye that does not change the color of skin or minimally changes the color of skin;
- and
- determining a dye concentration of the dye that does not transfer color or minimally transfers color.
A dye for use in a personal care product comprising, by weight percent of the personal care product in which such dye is provided, approximately 0.001500% Red 33 dye and approximately 0.003750% Orange 4 dye.
A method for selecting a dye for use in a personal care product, comprising:
- selecting a dye concentration that is brightly or intensely colored by testing a series of dye concentrations using a spectrophotometric and visual analysis;
- determining from the series of dye concentrations a dye concentration that does not change the color of skin or minimally changes the color of skin by applying a personal care product to the skin and visually inspecting the skin;
- determining from the series of dye concentrations a dye concentration that does not transfer color or minimally transfers color by applying the personal care product to the skin, contacting the skin with a color transfer substrate, and visually inspecting the color transfer substrate;
- and
- determining from the series of dye concentrations a dye concentration that does not stain or minimally stains by applying the personal care product to a staining substrate and visually inspecting the staining substrate.
Dependencies are inferred from the claim text.