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UV Fluorescent Pigments for security
UV White W3A
Topwell chemical develops and manufactures a range of organic and inorganic security pigments.
General introduction:
Under visible light, the UV Fluorescent Pigment color is white or nearly transparent. But under UV 254nm and 365nm light, the pigment show one or more fluorescent color. The main application is to prevent from counterfeiting.
It is also called UV phosphor pigment, security pigment.
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UV Fluorescent Security Pigments
UV Green Y2A
Topwellchem manufacture a range of organic and inorganic security pigments that are excited by both short and long wave UV light (as well as special dual excitation/emission products). Emissions span the range of visible colours and are generally intense and lightfast.
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Perylene Red 620
high fluorescent pigment also called Perylene Red 620，Lumogen red F300.
The combination of optical and electrochemical properties of perylene red 620 has potential application value in solar energy field！
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Perylene Orange high fluorescent pigment orange F240
Perylene Orange;N,N’-Bis(2,6-diisopropylphenyl)-3,4,9,10-perylenetetracarboxylic Diimide
This product can be used for bacterial culture, organic synthesis and other research purposes.
also used for cell solar energy cell pigment.
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Cas No.82953-57-9 Lumaogen F orange 240
High Performing Fluorescent dyes
Excellent weatherfastness
High heat stability
Extremely high chroma -
Red fluorescence dye R-300 cas 112100-07-9
High Performing Fluorescent dyes
Excellent weatherfastness
High heat stability
Extremely high chroma -
Photochromic pigment Sun Sensitive Pigment
Photochromic pigments change from one color to another and colorless to color when exposed to sunlight or ultraviolet (UV) light, and reverts to its original color when sunlight is blocked. After absorbing the energy of sunlight or UV light, it’s molecule structure is changed, which caused its absorbed wavelength to be changed allowing a color to appear.
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Sunlight Sensitive Pigment
Photochromic pigments change color when exposed to UV light or sunlight. Once removed from the UV light or sunlight, the pigment fades back to its normal color after a minute or so.
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Sun Sensitive Color Changing Photochromic Pigment
Photochromic pigment is a specialty designed powder to change color when exposed to a UV light source, but reacts best to direct sunlight. White or colorless when not exposed to sunlight.
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photochromic pigment change color by sunlight
Photochromic pigments or colours – change from clear to the target colour when exposed to sunlight or UV light.
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IR Upconverter Pigments 980nm
Anti-Stokes pigments are luminescent materials which are able to convert near infrared (NIR) laser light to visible (VIS) light. The anti-Stokes shift occurs when the emission is a shorter wavelength than the original excitation wavelength. Generally, the excitation wavelength is a sharply determined near infra-red laser light (980 nm or, in some cases, 940 nm). The effect shows up as a concentrated bright colour spot.
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photochromic pigment
Photochromic pigments that changes colors when exposed to Sunlight or UV light, and reverts to its original color when sunlight is blocked.The pigment is WHITE indoors, but when you move it outdoor and expose to Sunlight, it turns to your color depending on how strong the sun is and how much Ultra Violet light it absorbs. The process is reversible- when you go back indoor or block UV light, the pigment turns back to its original color- WHITE.
