Irreversible Thermochromic Pigments

Kromagen® aqueous concentrates and inks are microencapsulated thermochromic pigments which develop colour when heated above a given activation temperature.

These materials can be used in a variety of applications from security and brand protection through to novelty promotional products and are suitable for aqueous applications. Kromagen® pigments are available in a variety of colours and can be supplied as ready-formulated waterbased screen and flexographic inks. TMC are also able to customize products to customer requests.


    • Available in a range of activation temperatures between 60°C and 170°C, in a variety of colours.

    • Changes from colourless to coloured above the activation temperature. Irreversible colour change.

    • Lightfastness 1-3 (Blue Wool Scale).

    • Particle Size < 16 µm.

    • Bisphenol-A free.

    • Available as an aqueous dispersions or a custom solvent or UV system upon request. Finished ink systems also available.


    • 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.

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.

Kromagen™ Brochure

An overview of the products available on the Kromagen™ irreversible thermochromic pigment product range, including their features and how to use them.

Kromagen™ Brochure Brochure /