365 nm Organic UV Fluorescent Green Pigment for Security Applications

Nichwell Organic 365 nm UV Fluorescent Green Pigment is an advanced covert anti-counterfeiting material tailored for security inks, authentication labels, and specialty plastics.

Completely invisible and neutral under ambient daylight, it seamlessly blends into your base substrate. When exposed to standard 365nm UV-A light, it instantly emits a brilliant, high-intensity green fluorescence (peak 494–496 nm), providing a distinct and machine-readable optical signature for premium brand protection.

Key Technical Advantages

True Stealth Profile: Exceptional transparency in daylight; leaves no yellowish tint, ghosting, or color shadow on white security paper or clear films.
Optimized Particle Size Distribution: Carefully milled to eliminate excessive agglomerates, ensuring smooth dispersion in both liquid inks and polymer melts.
High Quantum Yield: Delivers potent green fluorescence even at micro-dosing levels (0.5%–3.0%), making it highly cost-effective for large-scale security printing.
Broad System Compatibility: Solvent-friendly structure compatible with offset, flexo, gravure, and screen printing mediums, as well as select thermoplastic resins.
Eco-Friendly & Safe: 100% organic formulation, RoHS compliant, and free of restricted heavy metals

Organic 365nm UV Fluorescent Green Pigment Specifications

To balance dispersion behavior, thermal resistance, and solubility across different systems, we offer three tailored grades:

Grade	Daylight Appearance	UV Peak Emission	Typical Particle Size (PSD)*	Key Performance Profile	Recommended Applications
Y3C	Off-white Powder	496 ± 5 nm	D50≤4.5 μm (Top Cut D90≤18 μm)	Engineered for ultra-smooth dispersion & consistent rheology	Standard security inks, offset printing, specialty thin coatings
Y3B	Off-white Powder	494 ± 5 nm	D50≤4.5 μm (Top Cut D90≤18 μm)	Enhanced thermal tolerance & outstanding light/weather resistance	Plastic masterbatches (PP/PE/PVC), durable industrial markings
Y3D	Off-white Powder	494 ± 5 nm	D50≤4.5 μm	Fast blending, high initial fluorescent brilliancy, cost-effective	General anti-counterfeit labels, consumer goods, high-volume production

Disclaimer & Data Tolerance:
The technical data and particle size distributions (PSD) listed above are typical reference values based on internal laser diffraction analysis (wet dispersion). Due to variations in testing equipment, dispersion methodology, and normal manufacturing lot tolerances, these values should not be construed as legally binding product specifications. The exact parameters for any commercial order will be strictly governed by the Certificate of Analysis (CoA) provided with the specific batch shipment. Customers are strongly advised to conduct thorough application testing in their specific binder systems before mass production.

Common Formulation Pain Points & How We Solve Them

1. Color Shadowing (Visible Tinting) on White Security Paper?

The Cause: Low-purity fluorescent powders often contain unreacted dye residues, leaving a faint yellow or greenish tint on the substrate under daylight.
Nichwell Solution: Our pigments undergo rigorous purification steps. At standard loadings (1-2%), they exhibit near-perfect transparency, ensuring your covert security marks remain 100% undetected until UV excitation.

2. Poor Dispersion or Settling in Low-Viscosity Inks?

The Cause: Hard agglomerates resisting solvent wetting, leading to pigment settling and uneven fluorescence on the printed product.
Nichwell Solution: Choose Grade Y3C. Its optimized surface polarity promotes rapid wetting and stable suspension in standard solvent and UV-curable ink systems.

3. Fluorescence Quenching During Plastic Injection Molding?

The Cause: Typical organic fluorophores degrade or shift color when subjected to high barrel temperatures (>200°C).
Nichwell Solution: Switch to Grade Y3B. Its highly crystalline matrix protects the fluorescent core, offering superior thermal stability and zero migration during compounding and molding.

Core Applications

Anti-Counterfeiting & Security: Banknotes, tax stamps, passports, ID cards, and tobacco/alcohol authenticity seals.
High-Security Printing Inks: Compatible with offset, gravure, flexographic, and screen printing processes for covert graphics.
Plastics & Masterbatch: Hidden authentication markers in molded parts, security yarns, and tamper-evident polymer closures.
Industrial NDT & Testing: Non-destructive testing, micro-crack penetrant detection, and automated PCB robotic alignment.

Why Choose Nichwell's UV Fluorescent pigment

Professional manufacturer with 10+ years of experience
ISO 9001 & REACH compliant, stable batch-to-batch quality
High brightness, fine particles & excellent dispersion
Customizable models, particle size and formulations
Testing samples, TDS & MSDS available
Factory direct supply, bulk stock & fast global delivery

UV fluorescent pigment packaging

Packaging: 1kg, 5kg, 10kg per bag; outer carton box
Storage: Keep sealed in dry, cool and dark place; avoid moisture and heat

Frequently Asked Questions (FAQ)

Q1: Is this powder visible under normal light?
A1: No. It appears as a faint off-white powder. Green fluorescence only appears under 365nm UV‑A excitation.

Q2: Can it be mixed with water-based inks?
A2: Yes, but requires proper dispersion. We recommend a non-ionic surfactant or pre-dispersion in a small amount of ethanol. Contact us for a free formulation guide.

Q3: What is the shelf life?
A3: 24 months when stored in original sealed packaging at 15–25°C and <50% relative humidity. Protect from direct sunlight.

Q4: Do you provide samples?
A4: Yes. Testing samples are available for qualified commercial or research projects.

Q5: Is this powder suitable for outdoor use?
A5: For short-term indoor use only. For outdoor applications, we recommend encapsulated or coated grades – please inquire.