So-called stability tests are performed at about the same time to the intern tests. The use of top quality raw materials, a multi-stage quality assurance, complete documentation and adherence to delivery dates are standard for COSMETIC-SERVICE. Not just the stability test but rheological checks permit physical structure and stability checks already during the new product development and help shortening the development periods, improving the quality as well as controlled supervising the Up-Scaling and the quality features. We from COSMETIC SERVICE ensure this by the accompanying control of the production steps by means of analytics, microbiology, application technology and physical examinations. We ensure that the composition stays unmodified e.g. at fluctuating temperature conditions in their consistency. The produced cosmetics in our house for you will not show alteration so that your quality promise for your customer will be kept.