High Temperature Activated, Irreversible, Colorless-to-Color Change Ink
Permanent change thermochromic ink is a high temperature activated, permanent change, colorless to color water based Screen, Flexo ink or pigment. It offers a gradual color change that becomes denser as the temperature increases. Inks are available in the range of 60 to 200ºC and in two standard colors: white to magenta and white to black. Numerous custom colors and temperature points are available; however, the ink is application and technique sensitive so it must be tried on the actual use.
Applications include but not limited to high temperature alerts, security images, pharmaceutical control , safety / engineering warnings and receipt /check validation to name a few.
Permanent Color Change Comparison
Color Change Comparison Chart
Test prints of various Hallcrest Permanent Change Thermochromic Inks were heated for 3 minutes and measured for color density.
Magenta, closely followed by Black reached the strongest color point at 60°C of the colors measured.
The color change for magenta and black is sharp.
Turquoise, Orange and Blue need a higher temperature point to reach a comparable density and have a more gradual color change profile.
NOTE: Magenta is best for lower temperature activation; at 60°C it shows good color
This information is for illustration only; It has been developed under strict laboratory conditions. The user should test and verify that the ink works for their particular application.
As Temperature Increases, Color Density Increases
