Activation temperature points range from low refrigeration type temperatures through normal body temperatures to high temperatures that exceed the pain threshold.

• Cold Activated Thermochromic Ink is used on labels and packaging to create a color change when cooled. (Clear to Color: 15ºC / 59ºF)

• Touch Activated Thermochromic Ink will vanish when rubbed or touched to reveal an image or another color printed beneath. (Color to Clear: 31ºC / 88ºF)

• Touch Activated Liquid Crystal Ink will change color within the visible spectrum when rubbed or touched.
  (Black » Red » Green » Blue: 25-30ºC / 77-86ºF)

• High Temperature Thermochromic Ink is designed to change color just below the pain threshold alerting consumers and users to a safety hazard - Too Hot! (Color to Clear: 47ºC / 117ºF)

Hallcrest thermochromic formulations are available as a finished ink, pigment or a liquid crystal screen ink. Colors and temperatures can be customized to your application and printing capability. Thermochromic Temperature Range: -10ºC to 69ºC (14ºF to 156ºF)