The chemistry of banknotes and coins progress of science

The paper examines the role of chemistry in the production and protection of banknotes and coins – key elements of economic life. It is explained that banknotes are made of special paper containing cotton or linen fibers, and in more modern cases – from a polymer, which making them stronger and more durable. The chemical components in these materials enable the incorporation of security features such as watermarks, microprinting and metal threads. In addition, nanoparticle inks are used to create holographic and other visual anti-falsification effects. Coins are made of metals or alloys such as copper, nickel and aluminum. Their composition is chosen based on the desired properties – corrosion resistance, strength and workability. The author shares a personal experiment with an old silver coin, which is successfully cleaned with baking soda. The conclusion is that chemistry is an integral part of creating durable, secure and modern money.