One color to another color thermochromic powder

Buying notice:
1.For lower prices or bulk prices, welcome email to us make further negotiation. We will check whether have cheaper freight costs to your address.
2. When we delivery, we maybe need to use other products name to write on parcel, in order to avoid high certificate costs for air transport, hope can understand this.
3. After received payment, we will send out parcel to another city wait for delivery. Estimate can leave China to you in 3 days.
4.Due to international freight costs is high, So we usually do not accept return order. If have any problem, we will do best to make compensate, thank you for understanding.

Products information:
Color change principle: One color changes another color, such as DF-207(red to yellow), the temperature below 31 degrees is displayed red, and the temperature above 31 degrees becomes yellow. When the temperature drops below 31 degrees again, the color returns to red. The color can change repeatedly depending on the temperature.
Color-changing effect from color A to color B can be obtained by matching color between thermochromic pigments and ordinary pigments

The color-changing principle and structure of reversible thermochromic pigments:
Thermochromic pigments are microcapsules that repeatedly change color as the temperature rises or falls.
Reversible thermochromic pigment is prepared by electron transfer organic compound system. Electron transfer organic compounds are a kind of organic hair color system with special chemical structure. At a specific temperature, the molecular structure of the organic matter changes due to electron transfer, thus achieving color transformation. This color-changing substance is not only bright in color, but also can achieve color change from the state of “colored === colorless”, “colorless === colored” or “colored === colored”, which is not possessed by heavy metal complex salt complexes and liquid crystal reversible temperature-sensitive color-changing substances.
Microencapsulated reversible thermochromic substance is called reversible thermochromic pigment (commonly known as: thermochromic pigment, thermochromic powder or thermochromic powder). The particles of this pigment are spherical, with an average diameter of 2 to 7 microns (one micron is one thousandth of a millimeter). The inside is a color-changing substance, and the outside is a transparent shell about 0.2 to 0.5 microns thick that can neither dissolve nor melt, which protects the color-changing substance from erosion by other chemicals. Therefore, it is very important to avoid damaging this shell in use.

About thermochromic temperature
In fact, the color change temperature of the color-sensitive pigment is not a temperature point, but a temperature interval, that is, the temperature range from the beginning to the end of the color change (T0 ~ T1). The width of this temperature range is generally 4~6 ° C, and some varieties with higher discoloration accuracy (narrow range varieties, represented by “N”) have a narrower discoloration temperature range, only 2~3 ° C.
In general, we define the temperature T1 corresponding to the basic completion of discoloration during the constant velocity heating process as the discoloration temperature of the thermochromic pigment

Uses: Slime creation, crystal clay creation, glue creation, ink, paint, color-changing nail polish, injection molding, silicone, printing and other wide applications.