Tannins and human health: a review. Chung KT, Wong TY, Wei CI, Huang YW, Lin Y. Department of Microbiology and Molecular Cell Sciences, University of Memphis, TN 38152, USA. Tannins (commonly referred to as tannic acid) are water-soluble polyphenols that are present in many plant foods.
How to Cast Jewelry. Jewelry casting is a process of making jewelry pieces that involves the pouring of liquid metal alloy into a mold. It is usually referred to as lost-wax casting because the casting mold is created using a wax model that is melted away to leave a hollow chamber in the middle of the mold.
Casting Need to Know Guide. In metalworking, casting is the process of setting molten metallic material in a pre-designed mold. Once the molten metal cools, it becomes a solid metal object in the desired shape. Casting can be achieved with a wide variety of metals, and various materials can be used to form the molds and other equipment.