search by
Copyright @ Pol J Cosmetol
Pol J Cosmetol 2013, 16(3): 241-245en  Effect of white linearly polarized light upon selected cosmetic creamsDominika Wójcik 1/, Magdalena Krystyjan 2/, Gohar Khachatryan 3/, Piotr Tomasik 1/ 1/ Cracow College of Health Promotion, Krowoderska Street 73, Cracow 2/ Department o Carbohydrate Technology, University of Agriculture, Cracow 3/ Department of Chemistry and Physics, University of Agriculture, Cracow Summary Introduction. Creams are designed as topical compositions for care or therapeutic purposes. Apart from oils and water they contain a variety of biologically active and fragrant components. All components are also responsible for physicochemical properties of the preparations. The latter jointly with sensory properties have an essential impact to the quality, shelf-life and mode of application of the creams. Aim. It is likely that illumination with white linearly polarized light (WLPL) of either creams or skin covered with cream can improve care effects and facilitate application of the creams. Materials and methods. Nivea universal cream for every skin, Soraya oil based antiwrinkle cream and Ziaja natural olive based cream for normal and dry skin were illuminated at room temperature with white linearly polarized light for 5, 10, 20, 30, 60 and 120 min and the effects of those operations were examined rheologically by running mechanical spectra of illuminated samples. Also spreadibility of the illuminated and original creams was qualitatively compared. Results. Elasticity and plasticity of Nivea cream are stable to the illumination whereas these parameters for Soraya and Ziaja creams decrease with extended illumination time. These changes in Ziaja cream are irregular in the illumination time suggesting certain instability of its components. The illumination improves spreadibility of Soraya and Ziaja creams. Conclusions. Illumination of some cosmetic creams with white linearly polarized light can improve their rub-in application. Such illumination has effect neither on elasticity nor plasticity of Nivea cream and has tremendous effect upon these parameters of Soraya cream. A moderate and irregular effect upon Ziaja cream may be associated with polymerization and grafting of glycerides of unsaturated acids of olive and sunflower oils on extended illumination. Key words: Nivea cream, Soraya cream, Ziaja cream, rheology, elasticity, plasticity, spreadibility |