GLS489 489nm Visible Light Absorbing Dye for Inks & Plastics
As our company’s star product, GLS489 is a cutting-edge visible light absorbing dye engineered for precise optical attenuation at exactly 489nm. Featuring an exceptionally narrow absorption band and outstanding thermal stability, it is widely utilized in high-security anti-counterfeiting inks, precision optical lenses, and specialized engineering plastics.
To meet diverse industrial requirements, our flagship GLS489 is carefully tailored into two specialized grades:
Available in Two Grades:
- GLS489A (Ink Grade): Heat resistance up to 230°C. Ideal for high-security anti-counterfeiting inks.
- GLS489B (Plastics Grade): Heat resistance up to 270°C. Ideal for PC/PMMA and precision optical lenses.
Quick Specifications:
- Peak Absorption: 489 ± 2nm (in MA)
- Purity: ≥98.5% (Dark green crystalline powder)
- Solubility: Soluble in DMF, MC, TCM, EtOH. Insoluble in Acetone.
Typical Product Specifications
| Property | Specification |
|---|---|
| Peak Absorption Wavelength | 489 ± 2nm (in MA) |
| Appearance | Dark green crystalline powder |
| Purity | ≥98.5% |
| Thermal Resistance | Grade A: Up to 230°C Grade B: Up to 270°C |
| Solubility | Soluble in DMF, MC, TCM, EtOH, MA |
| Insolubility | Insoluble in Acetone |
Spectrum Highlights: As demonstrated in the absorption spectrum, GLS489 exhibits a remarkably sharp and steep absorption peak precisely at 489nm. The baseline remains near zero across the 520–700nm range. This indicates an incredibly high signal-to-noise ratio: it blocks the targeted blue-green wavelength with surgical precision while maintaining excellent clarity and minimal interference with other visible colors.
Key Applications of GLS489
GLS489A – Ink Grade (Temp Resistance up to 230°C)
Specifically formulated for High-Security Printing & Anti-Counterfeiting Inks
GLS489A is the premier choice for security document protection. Capable of withstanding curing and drying temperatures up to 230°C, it remains stable in offset, gravure, flexo, and screen printing processes.
- Covert Security: Invisible or extremely low-visibility at low concentrations under normal white light.
- Machine-Readable Authentication: The ultra-narrow 489nm signature allows for high-speed automated sorting and authentication.
- Ideal for: Currencies, tax stamps, passports, ID cards, and premium brand protection labels.
GLS489B – High-Temperature Grade (Temp Resistance up to 270°C)
Engineered for Optical Lenses & Engineering Plastics (PC/PMMA)
When processing engineering plastics like PC and PMMA, dyes must survive severe thermal stress. GLS489B is upgraded to withstand severe processing environments up to 270°C without color shift or degradation.
- Optical Filtering: Effectively filters specific wavelengths to enhance contrast and readability in LCD brightness enhancement films (BEF) and specialized eyewear.
- Matrix Compatibility: Delivers uniform, flawless dispersion in demanding polymer matrices.
- Ideal for: Precision optical lenses, display films, and specialized plastic coatings.
Frequently Asked Questions (FAQ)
Q: Both are your star products, but what exactly separates GLS489A from GLS489B?
A: The primary difference lies in their thermal stability and target matrices. GLS489A offers heat resistance up to 230°C, making it optimal for the curing processes of anti-counterfeiting inks. GLS489B is our advanced high-temperature grade, capable of withstanding up to 270°C, making it mandatory for injection molding and extrusion processes of engineering plastics like Polycarbonate (PC) and PMMA.
Q: Why is the sharp peak shown in the spectrum graph important?
A: The graph shows a very narrow FWHM (Full Width at Half Maximum). This means the dye absorbs only the specific 489nm light, rather than a broad smudge of different colors. For security tools, this creates a crisp, unambiguous signal for scanners. For optical lenses, it blocks the unwanted frequency without darkening the user’s overall vision.
Q: Can GLS489 be used in water-based systems?
A: No, GLS489 is highly customized for organic solvent-based systems and polymer melts. If you require water-based solutions, please consult our technical team.
Q: Do you provide samples?
A: Yes. Because this is our flagship series, professional testing samples are available. Please specify your operating temperature and whether you need Grade A (Ink) or Grade B (Plastics) when placing your request.