Small bench work anvils can be used for jewelry but are clumsy for delicate work. However it is impossible to forge anything larger than fine wire on a little 5 oz. (150g) jewelers anvil and difficult to use a large 200 pound (90kg) forging anvil for jewelry work. Each task is best performed using the proper size tool.
Polyester Plastics - PET. PET is a polyester plastic with excellent wear resistance, a low coefficient of friction and good chemical resistance. Its dimensional stability, combined with low moisture absorption, allows PET polyester plastics to be machined into precise, high-tolerance components. PET is both FDA and 3A-Dairy compliant, making it ideal for food applications. PET has good mechanical properties, and it works well for high load and wear conditions.
Polyester is a synthetic fiber derived from coal, air, water, and petroleum. Developed in a 20th-century laboratory, polyester fibers are formed from a chemical reaction between an acid and alcohol.In this reaction, two or more molecules combine to make a large molecule whose structure repeats throughout its length.olyester is a chemical term which can be broken into poly, meaning many, and ester, a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene, which is derived from petroleum.