Due to the increased level of modern technology today’s Investment Casting requirements are getting more and more demanding. To fit these necessities contemporary techniques for characterizing the ceramic raw materials, shell and casting parts are essential.These presentations will show some investigation methods used these days. It will demonstrate for example the possibilities to investigate on the stuccos, like grain shape, possibilities to determine the refractoriness of the raw materials /ceramic shells, how to measure the permeability in cold and hot state and how to investigate on the shell structure.