Xuan Bao Hao Corp

I. Brief Introduction

Color changes of thermochromic pigments are induced by a temperature change. The pigments are composed of microcapsules that change colors reversibly. When temperature rises to a specific temperature the color changes. The color starts fading back to the original color as the pigment is cooled down.

low temperature	heated	high temperature

color appears	cooled	Colorless

II. Product Feature
Nine Standard Colors

Standard colors are violet, blue, light blue, green, yellow, orange, red and black.

Example: TCP59-31 (Yellow thermochromic pigment with color change at 31^oC )

A. Temperature of color changes
When the temperature is increased to a specific temperature, the color starts fading to colorless. The specific temperature of the color changes can be assigned at temperatures between 15^oC to 65^oC. The sensitivity of color changes is within 2^oC to 10^oC. The temperature of the color change set under 33^oC has a fine sensitivity and those over 33^oC are coarser.

-15^oC

20^oC

31^oC

43^oC

70^oC

Example 1. TCP45-20 indicates the blue thermochromic pigment changes its color when it is heated to 20 o C and become completely colorless at 22 o C. Conversely, the color starts to reveal when the temperature is decreased. It is recommended to use this temperature
for cold drinks.
Example 2. TCP63-31 indicates the orange thermochromic pigment changes its color when it is heated to 31 o C and become completely colorless at 35 o C. Conversely, the color starts to reveal when the temperature is decreased. This product is most suitable for products that change colors at body temperature.
Example 3. TCP69-43 indicates the red thermochromic pigment changes its color when it is heated to 43 o C and becomes completely colorless around at 47 o C. Conversely, the color starts to reveal when the temperature is decreased. It could be used as a caution for hot drinks.
　

III. Reference Colors for Application

A. By using three primary colors, you can adjust any color as you expect. You may mix different colors of thermochromic pigments with the same temperature to create more colors.

	+		mixture		heat

The following are some samples for your reference.

They can also be mixed with regular pigments so that the color can be changed from one to another. At lower temperature, the color reveals matched shade. When the temperature is increased, the thermochromic pigments start fading to colorless. It only shows color of the regular pigments.

Regular

Thermochromic
Pigment

mixture

The following are some samples as references.

B. By mixing the thermochromic pigments with different temperature ranges, the color can be varied for more than two colors.

Temperature ranges for 3-color variation

<0^oC

0^o~25oC

>25^oC

<10^oC

10^oC~25^oC

>25^oC

<30^oC

30^oC~45^oC

>45^oC

<33^oC

33^oC~55^oC

<55^oC

Features:
A. Thermochromic pigments:

Composed of microcapsules
Distribution of particle size is between 1~6
Heat resistance is up to 280^oC
Moisture content is about 0.3%
The shelf life of thermochromic pigments is approximately 2 years.

Application and Formulation Suggestions
A. Thermochromic pigments can be applied in coloring of plastics, paints, inks, dyes and dyed fabrics.

B. Dosage of application.

Materials	Ink, Paint Solvent type	Ink, Paint Water Type	Plastic Injection/Extrusion
Materials	Pigment %	Pigment %	Pigment %
Thermochromic pigment	5.0% ~ 30%	3.0% ~ 15%	0.5% ~ 3%

C. The products must be stored at room temperature, in a dry area and not exposed to sun.
D. For printing inks, it is recommended to adjust the pH value of resin between 4-7.
E. Toluene will affect the properties of the microcapsules. Avoid using as a solvent. If using a solvent mixture, try to minimize the toluene content.

The information herein is believed to be reliable and is to assist customers in determining whether our products are suitable for their applications. However, no warranty, express or implied, is made as to its accuracy or completeness and none is made as to fitness of this material for any purpose. Our products are intended for sale to industrial and commercial customers. We request that customers inspect and test our products before use and satisfy themselves as to contents and suitability. Nothing herein shall constitute any other warranty, express or implied, including any warranty of merchantability or fitness, nor of protection from any law or patent to be inferred. All patent rights are reserved. The exclusive remedy for all proven claims is replacement of our materials and in no event shall we be liable for special, incidental or consequential damages. We shall not be liable for damages to person or property resulting from its use. Consult the Material Safety Data Sheet for additional information.