Thermochromic Leuco Dye


LCR Hallcrest manufactures a range of Thermochromic products using Leuco Dye technologies. These are supplied in a variety of forms, both Reversible and Irreversible under the brand name Chameleon®.

We mix numerous Leuco Dyes with colour developers and a series of fatty acids, esters and alcohols that each have defined melt points to provide a range of materials that respond to different temperatures producing a variety of colours.

These systems can take the form of either microencapsulated slurries or concentrates before they are finished into their final form of a Label, Ink or Plastic component.

These products all change colour over a temperature range specific to their formulation providing a simple cost effective method of monitoring temperature.


  • Correct use or operation Indication
  • Safety warnings
  • Quality Control
  • Process Control
  • Interactive Packaging
  • Advertising messages

Product Information

Temperature range

Colour Change



+44 1244 817107