GLS680F 680 nm Near-Red Absorbing Dye
GLS680F is a bright yellow powder developed for spectral absorption in the deep-red region of visible light. Its absorption maximum is nm when measured in methyl acetate under the specified test conditions.
The dye is intended for formulation evaluation in optical coatings, filter films, inks and transparent material systems that require selective attenuation near 680 nm. It may also be evaluated as a red-edge spectral control component in multi-material optical filter designs.
Because 680 nm lies within the visible red region, GLS680F is more accurately described as a near-red or deep-red absorbing dye rather than a broad-spectrum near-infrared absorber. Performance in an IR-cut filter depends on the complete filter construction, including the substrate, coating thickness, dye concentration and any additional absorbing or interference-filter components.
Typical Specifications
- Absorption λmax: 680±2nm (in MA)
- Appearance: Bright yellow powder
- Measurement solvent: Methyl acetate
- Solubility: Soluble in methyl acetate
- Spectral region: Deep-red visible light
- Primary function: Selective optical attenuation near 680 nm
- Technical documents: TDS, SDS, COA and spectral data available on request, subject to document availability
Key Applications of Visible Light Sensitive Dyes of GLS680fF
Optical Filter Coatings and Films
GLS680F may be evaluated in optical coatings and polymer films that require selective attenuation near 680 nm. It can be considered for red-band suppression, spectral balancing and red-edge adjustment in multi-layer or multi-component filter systems.
Red-Edge Control in IR-Cut Filter Designs
In some IR-cut filter constructions, attenuation at the visible-to-near-infrared boundary is required to control red leakage or improve the transition profile. GLS680F may be evaluated as a formulation component for this purpose.
GLS680F alone should not be assumed to provide broad near-infrared blocking. The complete transmission spectrum of the finished filter must be measured to confirm performance over the required wavelength range.
Display and Liquid Crystal Film Development
The dye may be screened for use in display-related optical films and liquid crystal material stacks where selective deep-red absorption is needed. Its effect on brightness, color coordinates, contrast, haze and long-term stability should be evaluated in the final structure.
Optical Lenses and Transparent Components
GLS680F may be considered for coatings or transparent materials designed to reduce selected red-band transmission. Suitability depends on the required optical density, neutral color balance, substrate compatibility and service environment.
Machine-Readable and Security Ink Systems
The defined absorption response near 680 nm may be useful in machine-readable inks, authentication marks and spectral identification systems. Detectability and visual appearance depend on dye concentration, printing method, substrate, background color, coating thickness and reader configuration.
No claim of invisibility should be assumed without testing the complete printed system under the intended observation conditions.
PMMA and PC Formulation Evaluation
GLS680F may be evaluated in PMMA, PC and other transparent polymer systems for spectral modification or transparent coloration. Polymer compatibility must be confirmed under the intended processing conditions.
Recommended evaluation items include:
- Dispersion and dissolution
- Processing temperature stability
- Color shift after processing
- Migration and blooming
- Haze and transparency
- Absorption peak position in the polymer
- Light and heat aging performance
- Effect on mechanical properties
Why Choose Nichwell GLS680F?
- Precise 680nm wavelength calibration for professional optical systems
- High purity ≥98% ensures stable optical performance
- Excellent compatibility with MA-based coatings and inks
- Strict batch-to-batch consistency for mass production
- Full technical data including spectral curves available
- Stable supply and fast global delivery
FAQ
What is the absorption maximum of GLS680F?
GLS680F has a reported absorption maximum of nm when measured in methyl acetate under the specified test conditions.
Is 680 nm considered infrared light?
No. A wavelength of 680 nm is generally classified as deep-red visible light. GLS680F should therefore be described primarily as a near-red or deep-red visible-light absorbing dye.
Can GLS680F be used in an IR-cut filter?
GLS680F may be evaluated as a red-edge attenuation component in certain IR-cut filter designs. However, a 680 nm absorption peak does not demonstrate broad near-infrared blocking. The complete finished filter must be tested across its required wavelength range.
Is GLS680F soluble in methyl acetate?
Yes. GLS680F is specified as soluble in methyl acetate. To avoid ambiguity, the full solvent name should be used instead of the abbreviation “MA.”
Can GLS680F be used in PMMA or PC?
GLS680F may be evaluated in PMMA and PC formulations, but suitability should not be assumed without application testing. Thermal stability, dispersion, migration, haze, color shift and spectral performance must be checked under the intended processing conditions.
Can GLS680F be used in security inks?
Its defined absorption near 680 nm may be useful for machine-readable or spectral authentication systems. The visibility and detector response of a printed mark depend on concentration, substrate, ink composition, print thickness and reader design.
What dosage should be used?
The dosage depends on the required optical density, transmission target, film thickness and material matrix. A concentration series should be tested in the actual formulation before production.
Is a test sample available?
Evaluation samples may be requested. Please provide the intended substrate, solvent or resin, processing temperature, target spectrum and required sample quantity when contacting us.