The ceramic fiber testing service includes determining the sizing content of bundles, determining fineness and fiber diameter, and measuring the mechanical properties of individual fibers and bundles at room temperature in accordance with the procedures described in the European standards DIN EN 1007-1 to DIN EN 1007-5. Fiber and strand abrasion tests are carried out by using special equipment just as mechanical testing (creep, high temperature tensile strength) in an inert atmosphere up to 1500°C. In addition, Fraunhofer-Center HTL offers testing methods for characterizing the thermal stability of fibers in oxidizing atmospheres (gases such as CO2, synthetic air, moist air) up to 1750°C and in inert or reducing atmospheres (gases such as CO/CO2, nitrogen, argon, atmospheres containing hydrogen) up to 2100°C. Processes for examining the chemical resistance of fibers against acids, alkaline solutions and metal melts are completing our range of test options. Fiber testing includes fibers developed at HTL as well as fibers developed externally and fibers which are commercially available. Fibers can be manufactured at HTL using various textile production techniques.