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.
Answer Wiki. Theyâre like apples and oranges, or perhaps apples and concrete. Zinc alloys as commonly used for house fittings are less dense, have a lower melting point, are suitable for die casting, have short-chip machining characteristics, corrode rather easily and have fairly low tensile strength, fracturing with some ease.