Thermochromic inks have the property of changing color when the temperature changes. In the graphic industry, thermochromic inks are mostly printed on „smart“ packaging. With regard to the effect change, they can be reversible or irreversible. And with regard to the chemical composition, we divide them into thermochromic inks based on leuco dyes and those inks based on liquid crystals. Given that they change color when the temperature changes, they serve as an indicator of a product temperature change, most often in the food and pharmaceutical industry. Although they are very attractive and can be used in different applications, this same application is limited due to the high sensitivity of thermochromic inks to UV radiation and various solvents. During its life cycle, the packaging comes into contact with various substances, even those it protects. Thus, for example, oil, water, alcohol, if spilled on the packaging, can damage its functionality. Considering the high sensitivity of thermochromic prints, it is expected that they will be more susceptible to changes due to the action of chemicals than conventional printing inks. In addition to exposure to chemicals, graphic products (packaging) can be exposed to moisture and UV radiation, which can negatively affect stability during transport, storage and handling. Also, previous research has shown that the choice of printing substrate can directly affect the UV radiation stability of prints.