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.
There's a lot of misinformation about Napier jewelry. Soon there will be a book published on The Napier Co. with approximately 3000 pictures. A Word About Napier Sterling Jewelry. Napier marked all of their sterling jewelry with the word sterling. Napier also heavily plated their silver tone jewelry with a silver plate. Because of this, Napier jewelry is claimed to be solid sterling jewelry on auction sites and websites alike although it is not marked as such. This is not true.