Thermochromic pigment –The Science of Change:
Thermochromic Pigment are “smart” colorants that change their appearance in response to temperature fluctuations. Unlike traditional static dyes, these pigments act as a visual thermometer, transitioning between colors or moving from a solid hue to a transparent state once a specific thermal threshold—known as the Activation Point—is reached.
Thermochromic pigment bir toz pigment formundaki thermochromic mikro Kapsüller. They have been specially designed for use in non aqueous based ink systems although their use is not limited.
Onlar-ebilmek var kullanılmış formüle etmek olmayan sulu dayalı fleksografik, UV, Ekran, Ofset, Gravür ve epoksi mürekkep formülasyonları (sulu uygulamalar için biz-cekti salık vermek istimal Thermochromic çamurlar).
Thermochromic tozları altındaki belirli bir sıcaklık renklendirilir, ve renksiz veya baþka bir değiştirme, sıcaklık aralığı boyunca ısıtılır gibi daha açık renk. Bu pigmentler çeşitli renk ve harekete geçirmek sıcaklıklarda kullanılabilir.
How It Works: The Microencapsulation Secret
Modern thermochromic pigments (primarily Leuco Dyes) are engineered through advanced microencapsulation. Inside each microscopic droplet is a complex mixture of a color-former, a color-developer, and a solvent.
- Below Threshold: The internal components are in a solid state, allowing the molecules to interact and reflect a vibrant color.
- At Activation Point: As heat is applied, the internal solvent melts. This physically separates the color-former from the developer.
- The Result: The pigment becomes colorless (translucent), revealing whatever is underneath—whether it’s a hidden message, a secondary base color, or a printed graphic.
- Reversibility: Once the heat source is removed and the material cools, the process reverses, and the original color “magically” reappears.
Key Features & Performance
- Precision Temperature Windows: Pigments can be calibrated to react at specific points, ranging from -15° C (5°F) for cold-chain packaging to 70° C (158°F) for industrial safety warnings.
- Body-Heat Sensitivity: The most popular grade activates at 31° C (88°F). This makes the pigment change color instantly upon human touch, perfect for interactive marketing and textiles.
- High Contrast: Provides a sharp, visual “On/Off” signal that is much faster for the human brain to process than reading a digital display.
- Versatile Mediums: Available as a fine powder or a water-based slurry, it can be mixed into epoxy resins, screen-printing inks, plastik (injection molding), and industrial coatings.
Industrial vs. Creative Applications
| Uygulama | Usage Scenario | Purpose |
| Smart Packaging | Beer cans or wine labels. | “Perfect Chill” indicator for the consumer. |
| Industrial Safety | Steam pipes or electrical cables. | Visual warning of overheating or “hot to touch” surfaces. |
| Smart Textiles | Fitness apparel or high-fashion. | Changes color based on body heat or environmental temp. |
| Security & Logic | Anti-counterfeit labels. | Authenticate products by simply rubbing the label with a finger. |
| Creative Arts | Coffee mugs and “magic” art. | Reveals a hidden image when a hot beverage is added. |
Standart renkler: Siyah, Mavi, Eflatun, Yeşil, Turuncu & Kırmızı.
Standart harekete geçirmek sıcaklıklar: 15° C, 31° C ,37° C ,47° C. (customize -15°C – 80° C)
Teknik özellikler
Katılar: 98% +/- 2%
Partikül büyüklüğü: <6 mikron (97%)
Işık haslığı (Mavi Yün Ölçek): 1 - 2
Raf ömrü: 12 ay
Tüm Thermochromic pigment üretimi için kullanılan hammadde EINECS içinde listelenen, TSCA ve DSL/NDSL.
Depolama ve işleme
Thermochromic tozlar daha çözücü etkilere duyarlıdır, UV ışık, pH, Kesme ve pigment diğer birçok türde sıcaklığı. Her iyice önce ticari uygulama test edilmelidir böylece performans çeşitli renklerde farklılıklar vardır belirtilmelidir.
Thermochromic tozları ısı uzak saklı mükemmel istikrar var. 25° C altında mağaza. Dondurmak için izin verme, Bu kadar thermochromic kapsül zarar verir. Bir raf ömrü 12 ay garantili koşuluyla malzeme serin ve karanlık bir ortamda depolanır. Uzun süreli pozlama UV ışık veya yüksek sıcaklık thermochromic işlev kaybına neden olabilir. Depolama on iki aydan fazla tavsiye edilmez.
