Thermochromic (heat sensitive) labels change colour at different temperatures, and can produce an effect that is desirable for security, brand protection, marketing and aesthetic purposes.

Reversible thermochromic inks change colour from normal to altered and back to normal again many times - Irreversible thermochromic inks change colour only once, from normal to altered, leaving a permanent indication that the temperature has changed

Security authentication and brand protection - labels can change colour on contact with body heat -Chilled food quality checking, ensuring that goods are stored at the correct temperatures

Industrial product storage, where products must reach certain set temperatures as part of a process.

The key feature of thermochromic inks to be aware of is that at normal temperature, the majority of inks are solid colours (typically red, blue or black), but change to become clear at the designated change temperature. This allows you to hide the normal printed image at normal temperature, and show this at the colour change temperature.

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