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Plasticisers (US: plasticizers) can help make ink softer, more flexible, and adherent. They can also impart additional physical properties such as enhanced gloss and improved adhesion to problematic surfaces exposed to for example very low temperatures such as for example in packaging for frozen food. Plasticisers combine with the resins and become an integral and permanent part locked in within the ink film. They do not typically evaporate or volatilize.