Today, High-qulaity, pre-alloyed casting grain is available in various karats and colors to satisfy jewelers’ investment casting needs. Color variation is quite simply a function of chemical composition where the relative contents of silver and copper play a major role in determining not only the color of the alloy, but also other characteristics such as strength and hardness. Alloy chemistries are formulated primarily for the purpose of attaining a desired color. (more…)