The most widely used banknoteA banknote (or ‘bill’ as it is often referred to in the US) is a type of negotiable promissory note, issued by a bank or other licensed authority, payable to the bearer on demand. More substrateThe physical media or support on which the image is printed, such as paper, polymer or hybrid, etc. More throughout history, usually made from cotton, of short fibresA banknote security feature incorporated randomly during the manufacture of the paper. The fibres can be made of silk, plastic or metal, and may be visible, invisible, or fluorescent under UV light. More, which give a banknote special characteristics of touch, sound and firmness. It can include other fibres of different origins.