What is photochromic powder?
Light sensitive changing color powder, another name is photosensitive powder, color principle is to absorb certain wavelengths of ultraviolet light, and the color changes from the source of energy (into red, yellow, blue, purple, rose-red, orange), When UV light that a specific light course is gone, its return to its original color. The photosensitive powder is a product which has been treated by the microcapsule technology, and the appearance is powder, the particle size is 6.5UM, and has the characteristics of high temperature resistance, oxidation resistance, etc.. Photosensitive powder suitable for all kinds of printing ink, including screen, gravure and flexographic printing, can print on a variety of materials, package.Including fiber, paper, synthetic film, glass, ceramics, wood, etc.. , the design of the products are mostly in the room (no UV environment) and outdoor (with ultraviolet light environment) has a color change for the appeal.
1.Photochromic powder base color (colorless to colored):
Red, yellow, blue, purple, Rose-red, Orange. Induction wavelength: Red: 290-400nm, yellow: 270-370nm, blue: 280-390nm, violet: 290-390nm. General wavelength of purple light is 365nm, so the Yellow induction is not obvious.
2. Plastic injection and ejection applications:
Suitable for all kinds of plastic processing, such as PP,PE,PVC,PS,ABS,TPR,EVA,Nylon,Acrylic and so on, suggestions of plastics melt index (MI value) greater than 10, the bending elastic is less than 13000, suggest adding amount is 0.2%-5.0%, usually was 0.5%, When processing, Plastic adhesive should be wetted by paraffin oil.(note: The amount of paraffin oil should not exceed 2% of the plastic material ),then the color powder added to the plastic inside mix, mixing should pay attention to dispersion, poor dispersion can be added to the amount of dispersant. Can be mixed with different colors, with a variety of color changes. Avoid manufacturing processes above 250 degrees light fatigue of Photochromic powder is from excessive exposure to UV light, acid, free radicals (singlet oxygen atoms) and humidity, it can not be exposed for a long time.
3. Product usage notes:
Avoid to use with UV absorbers, high sensitivity to polarity, adding different additives or using different substrates, may cause color difference.
4. Toxicity and safety:
Photochromic powder on the skin without irritation, does not contain harmful substances for the human body, It is safety with toys and food packaging.
5. Storage:
Should be stored in sealed, dry, dark place, avoid direct sunlight.
6. Scope of application:
Light changing color T-shirt, Light changing color Frisbee, Light changing color hairpin, Light changing color lens.
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