CW-P Temperature Activated Reversible Thermochromic Pigment Color
Changing Powder Purple at -5~70℃
|Product name||Reversible Thermochromic Pigment|
|Temperature change form||Purple to Colorless|
|Discoloration principle||Color development at low temperature, colorless at high temperature|
|Characteristic||Bright colors, fast temperature sensing, high sensitivity|
|Use||Solvent-based coatings, inks, plastic injection, extrusion, etc.|
1. It is a brightly colored purple thermochromic powder. This
pigment can achieve the effect of changing from colorless to
purple. It displays its natural state at low temperatures. When the
temperature rises, it changes from purple to colorless, and the
temperature becomes lower. Then the color changes to purple again.
2. The pigment is a fine spherical powder with a heat-sensitive
pigment inside and an insoluble transparent coating on the outside.
The heat-sensitive color-changing pigment is very sensitive to the
external environment. The coating layer enhances the stability of
the heat-sensitive pigment. And chemical resistance, from the
erosion of other chemicals, but also enhance the applicability of
the product. During the processing, care must be taken to avoid
damage to this layer of coating.
The heat-sensitive color-changing pigment will change color with
the change of temperature (color-changing temperature range:
0-70℃). When heated, the structure of its internal substance will
change and the color will change. When it is cold, the internal
substance of the heat-sensitive pigment will return to the original
The structure is thus restored to its original color, which is
reversible repeatedly. In fact, the discoloration temperature of
thermochromic powder is not a temperature point, but a temperature
range, that is, the temperature range from the start of the
discoloration to the end of the discoloration. The width of this
temperature range is generally 4~6℃.
Matters needing attention for thermochromic pigments
Light fastness: The heat-sensitive color changing powder has poor
light fastness, and will quickly fade and lose efficacy when
exposed to strong sunlight, so it is only suitable for indoor use.
Avoid strong sunlight and ultraviolet light, which will help extend
the life of the color-changing pigment.
Heat resistance: heat-sensitive pigments can withstand high
temperatures of 230°C in a short time (about 10 minutes), and can
be used for injection molding and high temperature curing. However,
the thermal stability of thermochromic pigments is different in the
color development state and the decolorization state, and the
stability of the former is higher than that of the latter. In
addition, when the temperature is higher than 80°C, the organic
matter constituting the discoloration system will also begin to
degrade. Therefore, color-changing pigments should avoid long-term
working at a temperature higher than 75°C.