Multiple emulsions for colorants
AssigneeChr. Hansen Natural Colors A/S
InventorsSarah Louise Mason, Marie Bonnet
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Abstract
The present invention is related to a multiple emulsion of the water-in-oil-in-water (W/O/W) type for stabilization of natural coloring agents, such as anthocyanin, phycocyanin, carthamus, huito, calcium carbonate, carmine and carminic acid, against changes in pH values, oxidation and light as well as against ingredient interactions.
Claims14
A method for protecting a water-soluble or water-dispersible natural coloring agent against changes in pH, comprising formulating the natural coloring agent in a water-in-oil-in-water (W/O/W) emulsion comprising an internal aqueous phase, an oil phase, and an external aqueous phase, such that the natural coloring agent is located in the internal aqueous phase of the W/O/W emulsion and is protected from changes in pH outside of the W/O/W emulsion, wherein the pH gradient between the internal aqueous phase and the external aqueous phase is at least 2.0.
Dependencies are inferred from the claim text.