Memory Type Thermochromic Material
A. Principle
By using microencapsulation technology, the leuco-dyes, color developers, and special temperature controllers are encapsulated and made into pigments.
When heated above 55°C, the color changes to and remains at colorless. As cooled below 0°C, the color reverts to and restores at colored. With in 0~55°C, it can stay colorless after heating or colored after cooled.
The Major applicaiton is earsable pen or fountain pen ink.
B. Product Information
Specification：Standard、BPA Free
Particle Size：1~15μm
Temperature Range：Wide Memory- 0°C colored/ 55°C colorless; Middle Memory- 15°C colored/ 30°C colorless
Certification：EN-71-3, RoHS
Standard Colors：
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Red
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Orange
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Yellow
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Blue
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Purple
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(The above colors are for reference only.)
C. Available Forms & Applicability：
| No. | Forms | Slurry | Powder |
|---|---|---|---|
| 01 | Solvent：Ink, Paint | Suggest Concentrations：5~30%w/w(25%) |
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| 02 | Aqueous：Ink, Paint | Suggest Concentrations：5~60%w/w(25%) |
Suggest Concentrations：5~30%w/w(25%) |
| 03 | Plastic Injection, Extrusion | Suggest Concentrations：0.1~5%w/w(0.5%) |
：Applicable、 ：Conditionally Applicable、 ：Not Applicable。
D. Notice：
1. Avoid using polarity solvents such as alcohols (methanol, ethanol), ketones (acetone, butanone) …etc.
2. It’s normal phenomenon the slurry clumps up, if it occurs, please double boil the slurry at 45°C, and stir gently until uniform before using.
3. Processing temperature should not exceed 230°C.
4. Thermochromic materials and products should be sealed and kept in dark to prevent UV aging that will affect color-changing function.