The determination of synthesis conditions and color properties of pigments based on layered double hydroxides with Co as a guest cation

Nail polish, in particular gel is the most commonly used cosmetic product. A component of which determines consumer color characteristics polish. Layered double hydroxides (LDH) are promising pigments. To expand range colors and shades pigments, use LDH with colored host guest cations promising. The parameters synthesis samples Zn-Co Cu-Co hydroxide pigments were studied. obtain Co as a cation synthesis, conversion cobalt to trivalent state was carried out at temperature 80 °C using oxidation atmospheric oxygen or sodium hypochlorite. efficiency evaluated by X-ray phase analysis presence absence cobalt-containing phases. synthesized pigment studied spectroscopic measurement calculation RGB, CIELab, LCH models. low moment an elevated shown, while released separate Co3O4 phase. higher hypochlorite formation revealed. It recommended Co2+ Co3+ form cation. zinc oxide found both types due thermal decomposition hydroxide. Comparative showed that all have brown different saturation. revealed during Co-containing LDH, lightness decreases. Color saturation increases case cation, such Cu.