Patent ID: 8877166

Claim:
A liquid skin cleansing composition consisting of: (a) 4% to 10% of red petrolatum; (b) 1% to 10% of at least one surface-treated metal oxide pigment that blocks ultraviolet radiation in the wavelength range of from about 290 nm to about 400 nm; (c) at least one organic sunscreen agent having a log P of greater than 4.0 that blocks or absorbs ultraviolet radiation in the wavelength range of from about 290 nm to about 400 nm; (d) at least one lathering anionic surfactant; (e) at least one lathering non-ionic surfactant; (f) 0.5% to 3% of a C 30 -C 45 alkyl methicone and C 30-40 olefin silicone wax; (g) a volatile cyclic silicone; and (h) 0.1% to 20.0% of melanin or a melanin precursor selected from the group consisting of L-dopa, tyrosine, tryptophan, and cysteine, and (i) iron oxide pigments; wherein the composition is photostable and the composition leaves a residual film having an SPF of at least about 6 on a substrate after a cleansing process that is followed by rinsing wherein the cleansing process comprises the sequential steps of: (a) first, calculating the MED on a human subject by (i) delivering a series of measured UV doses from a xenon arc solar simulator to an unprotected 50 cm 2 site on the subject's mid-back; (ii) 24 hours after step (a)(i) determining the minimal erythemal dose (MED) as the lowest UV dose which produced mild erythema reaching the borders of the site; and (b) second, wetting a 50 cm 2 area of skin with 10 ml of distilled water at 100° F.; (c) third, applying 100 mg of the cleansing composition to the 50 cm 2 area; (d) fourth, rubbing the 100 mg of cleansing composition into the 50 cm 2 area of skin for one minute; (e) fifth, rinsing the 50 cm 2 area of skin with 20 ml distilled water at 100° F. for 30 seconds; (f) sixth, allowing the 50 cm 2 area of skin from which the cleansing composition was rinsed in step (e) to dry for fifteen minutes; (g) seventh, irradiating the 50 cm 2 area that was allowed to dry in step (f) with a dose of ultraviolet radiation from a xenon arc solar simulator UV ranging from 0.64 to 1.56 times the MED; (h) calculating the SPF as the ratio of Q to R where (i) Q is the MED for the 50 cm 2 area to which the cleansing product had been applied, rubbed in, rinsed off and allowed to dry in steps (b)-(f); and (ii) R is the MED for the unprotected 50 cm 2 site.