top of page


Join date: May 15, 2022


Parasitologia Clinica De Craig Faust 3 Ed Rev [March-2022]




23, by Manuel H Paredes (Facultad de Farmacia y Enfermedades, Universidad Autónoma de Zacatecas). Category:Parasitology Category:History of medicine Category:Academic publishing Category:Medical manualsVarious techniques are known in the art for enhancing the aesthetic characteristics of skin and/or hair by topically applying a cosmetic product to the surface of the skin or hair. More specifically, various topical cosmetic products are known for enhancing the cosmetic appearance of hair and/or skin including, for example, hair coloring products, hair bleaching products, hair straightening products, hair products and/or skin products. The most commonly used hair products include hair coloring compositions, such as, for example, hair dyes and/or hair bleaches. Hair coloring products and compositions are generally recognized as beneficial for providing temporary as well as permanent changes to the color of hair. Although hair coloring products and compositions provide a wide variety of color options, the ultimate consumer typically selects one product and/or composition and applies the composition to their hair, which may subsequently be irradiated with light or heated to effect the desired color change. By way of example, various conventional hair coloring compositions typically include coloring materials such as, for example, oxidative dyes, direct dyes, reactive dyes, and the like. These coloring materials may be classified as either temporary or permanent dyes. Conventional hair coloring compositions containing temporary dyes include color fixative compositions, such as, for example, the compositions set forth in U.S. Pat. No. 4,450,164 to Tardos, U.S. Pat. No. 4,816,555 to Bins et al., U.S. Pat. No. 4,925,694 to Bins et al., U.S. Pat. No. 5,227,164 to Suva et al., and U.S. Pat. No. 5,554,347 to Florczak et al., and the like. Such compositions generally remain on the hair after the desired color alteration has been achieved and may therefore be referred to as “wash-out” compositions. Conventional hair coloring compositions containing permanent dyes provide consumers with the permanent color they desire. Most conventional permanent dyes include one or more cationic developers or couplers, one or more anionic dyes, and a variety of other additives. The dyes react with one another to form complex colored




bottom of page