Commodity money cans or foil pouches of mackerel fish fillets, which have a fairly standard cost and are easy to store. These may be exchanged for many services in prisons where personal possession of currency is prohibited. In situations where the commodity is metal, typically gold or silver, a government mint will often coin money by placing a mark on the metal that serves as a guarantee of the weight and purity of the metal. In doing so, the government will often impose a fee which is known as seigniorage. The role of a mint and of coin differs between commodity money
Industrial processes materials by forming their liquid form using a mould. Many materials exist in an impure form, purification, or separation provides a usable product. Early production of iron was from meteorites, or as a by-product of copper refining. The nature of an organic molecule means it can be transformed at the molecular level to create a range of products. Organized by product: A list by process: Industrial processes Industrial processes are procedures involving chemical, physical, electrical or mechanical steps to aid in the manufacturing of an item or items, usually carried out on a very large scale. Industrial processes are the