A method of printing with cosmetic inks on human nails and skin comprising providing an ink jet pen and an ink set for full color thermal ink jet printing, the ink set comprising: a) a cyan ink comprising a cosmetically approved cyan dye in an amount ranging from about 1 to about 6 wt.% based on a total weight of the cyan ink; b) a magenta ink comprising a cosmetically approved magenta dye in an amount ranging from about 1 to about 6 wt.% based on the total weight of the magenta ink; and c) a yellow ink comprising a cosmetically approved yellow dye in an amount ranging from about 1 to about 6 wt.% based on a total weight of the yellow ink; wherein each of the cyan ink, magenta ink, and yellow ink contains: 1) a cosmetically approved humectant in an amount ranging from about 7 to about 30 wt.% based on a total weight of the ink; 2) a cosmetically approved surfactant in an amount ranging from about 0.08 to about 5.0 wt. % based on a total weight of the ink; and 3) water in an amount sufficient to provide 100 wt.% for each of the cyan, magenta and yellow inks based on a total weight of the ink, and the ink set further comprising a penetrant, the penetrant being selected from the group consisting of 1,2 alkyl diols containing from 4 to 10 carbon atoms in the alkyl group; and the method comprising: when the ink set is printed on a skin of a person, ejecting the ink set in a predetermined amount onto the skin; and when the ink set is printed on finger nails or toe nails of a person, pre-coating the finger nails or toe nails with an ink receptive layer including a mixture of a pigment and a fiber in admixture with a binder, and ejecting the ink set in a predetermined amount onto the finger nails or toe nails after the pre-coating. a) a cyan ink comprising a cosmetically approved cyan dye in an amount ranging from about 1 to about 6 wt.% based on a total weight of the cyan ink; b) a magenta ink comprising a cosmetically approved magenta dye in an amount ranging from about 1 to about 6 wt.% based on the total weight of the magenta ink; and c) a yellow ink comprising a cosmetically approved yellow dye in an amount ranging from about 1 to about 6 wt.% based on a total weight of the yellow ink; wherein each of the cyan ink, magenta ink, and yellow ink contains: 1) a cosmetically approved humectant in an amount ranging from about 7 to about 30 wt.% based on a total weight of the ink; 2) a cosmetically approved surfactant in an amount ranging from about 0.08 to about 5.0 wt. % based on a total weight of the ink; and 3) water in an amount sufficient to provide 100 wt.% for each of the cyan, magenta and yellow inks based on a total weight of the ink, and 1) a cosmetically approved humectant in an amount ranging from about 7 to about 30 wt.% based on a total weight of the ink; 2) a cosmetically approved surfactant in an amount ranging from about 0.08 to about 5.0 wt. % based on a total weight of the ink; and 3) water in an amount sufficient to provide 100 wt.% for each of the cyan, magenta and yellow inks based on a total weight of the ink, and when the ink set is printed on a skin of a person, ejecting the ink set in a predetermined amount onto the skin; and when the ink set is printed on finger nails or toe nails of a person, pre-coating the finger nails or toe nails with an ink receptive layer including a mixture of a pigment and a fiber in admixture with a binder, and ejecting the ink set in a predetermined amount onto the finger nails or toe nails after the pre-coating.