Patent ID: 7776316

Claim:
An emulsion comprising at least one photochromic coloring agent selected from the group consisting of titanium oxides, aluminum oxides, zinc oxides, zirconium oxides, calcium oxides, magnesium oxides, silicon oxides, iron oxides, and mixtures thereof, and at least one non-photochromic coloring matter selected from the group consisting of pigments, white fillers, pearlescent preparations, lipophilic colorants, hydrophilic colorants, and mixtures thereof, wherein the emulsion comprises at least two phases, wherein the photochromic coloring agent and the non-photochromic coloring matter are present in separate phases of the emulsion, and wherein the ΔE 15 value of the emulsion is higher than the ΔE 15 value of the same emulsion which differs only in that the photochromic coloring agent and the non-photochromic coloring matter are present in the same phase.