There are numerous factors in the investment casting process that impact the quality and integrity of the finished parts, but one of the most basic elements, the raw materials, is also one of the most important. Starting with the purest, highest quality alloys is essential. Impurities can cause a variety of problems while making the castings. It is also important to choose the alloys and material components that will produce part with the optimal characteristics for each application. Not all foundries can effectively cast complex and specialized alloys.