At Koster Keunen laboratories, we have conducted extensive studies on the performance of the Kester Waxes in finished personal care formulations. Our latest findings appear in the March 2022 edition of Personal Care Magazine. In our article, “Opacity, Viscosity, Structure or Body,” we show the utility and versatility of three of the Kester Waxes, Kester Wax K -48, K-56, and K-59.
In the study, we found that the inclusion of each of the three wax esters reviewed showed improvements in opacity, gloss, and overall brightness, making the resulting formulas look more expensive and luxurious.1
The tested esters’ performances were indicative of the usefulness of the Kester Wax Series. Kester Wax K-48 (Cetyl Palmitate) showcased wide formula compatibility, bringing a bright, white opacity to nearly all the test systems, regardless of emulsifier type or oil phase loading. Kester Wax K-56 (Cetyl Stearate) also demonstrated effectiveness as an emulsion opacifier, with the additional benefit of building emulsion viscosity.
The third monoester in the study, Kester Wax K-59 (Stearyl Stearate), showed another type of versatility, acting as an emollient and emulsion opacifier, as well as offering the possibility of acting as the sole structurant when used at the right levels in anhydrous formulas. The table below gives a summary of just how flexible the Kester Waxes are in cosmetic chemistry. In both emulsion and anhydrous systems, the Kester Waxes shine.