A tunable hair dye composition that includes at least two photochoromic dyes, each activatable by activating electromagnetic radiation and deactivatable by deactivating electromagnetic radiation. The composition can be applied to a target skin or hair surface and, when activated, impart a temporary color change to the skin or hair. Prior to activation, the photochromic dye is generally colorless. The intensity or shade of a color imparted by a photochromic dye can be tuned by adjusting the fluence of the activating and/or deactivating electromagnetic radiation. Thus, a wide variety of different hair colors can be obtained from a single hair dye composition containing specific combinations of photochromic dyes.

A cosmetic ingredient for cosmetic products has a polymer structure which includes an emollient or film-forming cosmetic polymer which is transparent to light. An organic chromophore molecule is inserted and chemically linked into the polymer, which can be a fixed color molecule or a photochromic molecule capable of rapidly switching from one color to another. The colored or photochromic molecule is inserted and chemically linked by transesterification into a cosmetic oil provided with functionalities which are suitable for the chemical anchoring of the molecule and chemically linked to said oil. The cosmetic oil may be a silicone macrodiol functionalized with a photochromic derivative designed so as to ensure the transition between a colorless state and a colored state following irradiation with ultraviolet light.

Cosmetic and dermatological compositions, including color changing compositions, are provided which typically include a plurality of synthetic particles having a size in the micrometer or nanometer range. Each synthetic particle typically includes one or more aggregates of a pigment selected from phenoxazone, phenoxazine, and a derivate or precursor thereof, and a stabilizing material which has a refractive index larger than 1.45; the aggregates having a size larger than about 100 nm and the composition being biodegradable and biocompatible.

A cosmetic ingredient for cosmetic products has a polymer structure which includes an emollient or film-forming cosmetic polymer which is transparent to light. An organic chromophore molecule is inserted and chemically linked into the polymer, which can be a fixed color molecule or a photochromic molecule capable of rapidly switching from one color to another. The colored or photochromic molecule is inserted and chemically linked by transesterification into a cosmetic oil provided with functionalities which are suitable for the chemical anchoring of the molecule and chemically linked to said oil. The cosmetic oil may be a silicone macrodiol functionalized with a photochromic derivative designed so as to ensure the transition between a colorless state and a colored state following irradiation with ultraviolet light.

In one aspect, the disclosure relates to stimuli-responsive chromogenic compositions that change from a first color to a second color upon application to the skin of a subject and exposure to a stimulus including, but not limited to, heat, light, mechanical rubbing, exposure to electric current, and the like. The compositions include a non-toxic pigment and a cosmetic carrier and do not stain the skin. Additionally, the compositions are stable when stored, even under conditions of elevated temperature. Also disclosed are methods of making the same and methods of treating skin conditions using the same. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

A facial patch product includes a hydrocolloid patch, a hydrogel patch, and a silicone patch. The hydrocolloid patch has a hydrocolloid patch outer layer that forms a physical barrier over a hydrocolloid layer attached to the hydrocolloid patch outer layer. The hydrogel patch has a hydrogel patch outer layer that forms a physical barrier over a hydrogel layer attached to the hydrogel patch outer layer. The hydrocolloid patch, hydrogel patch, and silicone patch are separate from one another.

A substrate having an edible color additive within the substrate or coated on the substrate is disclosed. The edible color additive comprises xanthommatin at a concentration of about 0.01% wt to about 0.5% wt and optionally a dry based carrier or a solution-based carrier. The substrate is a food, beverage, drink, medication or a drug form. The color additives of the disclosure can be produced in the color spectrum of yellow, orange, red, or concentrated forms (e.g., concentrated yellow appears as brown).

Cosmetic and dermatological compositions, including color changing compositions, are provided which typically include a plurality of synthetic particles having a size in the micrometer or nanometer range. The cosmetic or dermatological formulation comprises an antioxidant or UV filter and xanthommatin pigment present in the formulation at a concentration of 0.01% wt to 0.5% wt to scavenge free radicals. The cosmetic or dermatological formulation can be a sun protectant composition having an SPF of 2-30.