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.
10 most extreme places on Earth. Costume jewelry is jewelry made from inexpensive metals and imitations of precious stones. It tends to be flashy and sometimes over the top with gaudiness, although subdued costume jewelery that is designed to imitate more upscale jewelry is also available.ostume jewelry may include earrings. Imitation pearl necklaces are a more subdued type of costume jewelry. Costume jewelry is jewelry made with inexpensive metals and precious stone imitations. Some costume jewelry brands are carried by exclusive boutiques.