The National Bank of Kazakhstan has released a video showing how banknote paper and security features of the tenge are tested before circulation. During the tests, specialists simulate exposure to household dirt, water, detergents, friction, and high temperatures, according to infohub.kz.
To replicate everyday grime, a special artificial mixture is created. The paper is measured before the substance is applied, then placed in a machine that reproduces wear from real-world handling, and the changes are evaluated.
Separately, the banknotes are checked for resistance to sudden temperature changes and high humidity, for example if money gets caught in the rain. Strength, flexibility, and resistance to double folds are also tested.
The central bank notes that the scenario of accidentally laundering money in a pocket is fully covered by laboratory tests. The research is necessary to introduce new security technologies so that tenge banknotes retain their appearance, structure, and security features throughout their lifespan.