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.
Polypropylene is occasionally recycled. PP is strong and can. usually withstand higher temperatures. It is used to make lunch. boxes, margarine containers, yogurt pots, syrup bottles, prescription bottles. Plastic bottle caps are often made from PP. Polystyrene is commonly recycled, but is difficult to do. Items. such as disposable coffee cups, plastic food boxes, plastic cutlery. and packing foam are made from PS. Code 7 is used to designate miscellaneous types of plastic not. defined by the other six codes. Polycarbonate and Polylactide are. included in this category. These types of plastics are difficult to. recycle. Polycarbonate (PC) is used in baby bottles, compact discs, and medical storage containers.