Thermochromic pigment are thermochromic micro capsules in a powder pigment form. They have been specially designed for use in non aqueous based ink systems although their use is not limited.. They can be used to formulate non aqueous based flexographic, UV, Screen, Offset, Gravure and Epoxy Ink formulations (for aqueous applications we would recommend using Thermochromic slurries). Thermochromic Powders are colored below a specific temperature, and change to colorless or to another, lighter color as they are heated through the temperature range. These pigments are available in various colors and activation temperatures.
Standard Colors: Black, Blue, Magenta, Green, Orange & Red.
Standard Activation Temperatures: 15°C, 31°C , 47°C. (customize -10c – 100c)
Solids: 98% +/- 2%
Particle Size: <6 microns (97%)
Light Fastness (Blue wool Scale): 1 – 2
Shelf Life: 12 months
All raw materials used for production of Thermochromic pigments are listed in EINECS, TSCA and DSL/NDSL.
Storage and Handling
Thermochromic Powders are more sensitive to the influences of solvents, UV light, pH, Shear and temperature than many other types of pigment. It should be noted that there are differences in performance of the various colors so that each should be thoroughly tested before commercial application.
Thermochromic Powders have excellent stability when stored away from heat. Store below 25°C. Do not allow to freeze, as this will damage the thermochromic capsules. A shelf life of 12 months is guaranteed provided that the material is stored in a cool and dark environment. Long term exposure to UV light or elevated temperature can cause loss of thermochromic function. Storage longer than twelve months is not recommended.