Reversible Thermochromic Pigments

ChromaZone® free-flowing powders and aqueous slurries are microencapsulated thermochromic pigments that change colour when heated. They are based on a combination of colour formers (leuco dyes), colour developers and melt materials. ChromaZone® products change from coloured in their cold state, to colourless when heated above the activation temperature - with colour returning once the material has cooled to below the activation temperature.

These materials can be used in a variety of applications such as security and brand protection, novelty promotional products and toys. They are suitable for aqueous, non-aqueous and radiation cured formulations (some excpetions withstanding on solvent choice however). Standard activation temperatures are 15°C (fridge temperature), 31°C (body temperature) and 47°C. These are available in a variety of colours. TMC are also able to customize products to customer requests.


    • Available in a range of activation temperatures between -20°C and +70°C, in a variety of colours.

    • Changes from coloured to colourless on heating.

    • Lightfastness 1-3 (Blue Wool Scale).

    • Particle Size < 7 µm.

    • Bisphenol-A free.

    • Available as either aqueous dispersions or free flowing powders. Suitable for aqueous, non-aqueous and UV curing formulations (some solvents not suitable however).


    • High colour strength possible.

    • Products can be combined to give unique mutli-temperature effects.

    • Good lightfastness under visible light.

    • Colour changes over a relatively narrow temperature range.

Typical Applications

    • Security and brand protection.

    • Anti-counterfeiting.

    • Product labelling and temperature indication.

    • Interactive packaging and promotional materials.

    • Thermochromic masterbatch.

Related brochures & technical literature

You will find some of the key product brochures available for download below. There are more brochures available upon request. If you would like to discuss your enquiry further then please get in contact by phone or by filling in the "Request a Callback" form at the top of the page. Someone from the technical sales team will then call you within 24 hours, to discuss your project further.

ChromaZone® Brochure

An overview of the products available on the ChromaZone® reversible thermochromic pigment product range, including their features and how to use them.

ChromaZone® Brochure Brochure /