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


Temperature range

  • Reversible -20 to 70°C with a large number of standard temperature available.
  • Irreversible  55 to 175°C with a 75 and 90 available as standard

Colour Change

  • Reversible   Standard: Blue, Black, Red, Orange, Green and Magenta    Custom: Most colours can be produced on request 
  • Irreversible  Standard: Black and Magenta     Custom: Most colours can be produced on request 


  • Reversible   Labels: Paper or Plastic    Inks: Screen, Flexo, Gravure and Offset    Plastics: Moulded item and Masterbatch concentrate 
  • Irreversible  Labels: Paper or Plastic    Inks: Screen and Flexo  


  • Labels can be produced in a variety of Custom sizes, shapes and materials offering a bespoke solution designed to suit a wide range of applications
  • Inks are available in a vareity of pack sizes from 1 kilo pot to 200 kilo drums
  • Plastic products can be created and moulded for you or a Masterbatch can be supplied for you to create your own product,