HunterLab ColorFlex EZ Color Difference Meter for Coil Coated Panels
| Brand | HunterLab |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported |
| Model | ColorFlex EZ |
| Product Type | Color Difference Meter |
| Instrument Type | Benchtop |
| Optical Geometry | 0°/45° Integrating Sphere |
| Light Source | Pulsed Xenon Lamp |
| Spectral Range | 400–700 nm |
| Repeatability | ΔE*ab ≤ 0.04 (average, CIE Lab) |
Overview
The HunterLab ColorFlex EZ Color Difference Meter for Coil Coated Panels is a benchtop spectrophotometer engineered for high-precision color measurement in industrial quality control environments. Utilizing a pulsed xenon lamp and a 0°/45° optical geometry with an integrating sphere, the instrument replicates human visual perception under standardized illuminants—ensuring metrological alignment with CIE-defined color spaces. Its optical design minimizes directional sensitivity and specular influence, making it especially suitable for evaluating textured, matte, or gloss-coated coil-coated metal substrates where surface finish variability can compromise measurement fidelity. The system operates across the visible spectrum (400–700 nm) at 10 nm reporting intervals, employing a diffraction grating monochromator and a 256-element silicon photodiode array to deliver stable, traceable spectral reflectance data. With a 31.8 mm measurement aperture and spectral bandwidth of 12 nm (FWHM), the ColorFlex EZ meets the fundamental requirements for ASTM D2244, ISO 11664, and ISO 13655 compliance in color difference evaluation.
Key Features
- Benchtop 0°/45° optical configuration with integrating sphere—optimized for non-directional, geometry-insensitive measurement of coated metal panels, plastics, and flat industrial surfaces
- Pulsed xenon light source providing full-spectrum illumination without thermal drift; rated for >500,000 measurements with consistent spectral output
- Self-contained operation: integrated 6.4 × 6.4 cm full-color LCD display enables real-time viewing of CIE XYZ, CIELAB, CIELCh, Hunter Lab, Yxy, and Rdab coordinates—no external PC required
- Onboard calculation of industry-standard metrics: ΔE*ab, ΔEcmc(2:1), whiteness (CIE/ASTM E313), yellowness (ASTM E313), metamerism index (MI), ISO color change, and staining index
- Multi-illuminant support: A, C, D65, F2 (CWF), F7 (D65 simulator), F11 (TL84), and Tungsten; dual observer angles (2° and 10° standard)
- Sealed membrane keypad rated for humid or dusty production-floor environments; compact footprint (22.9 × 13.0 × 16.0 cm) and lightweight design (4.5 kg)
- USB 2.0 interface for direct data export; optional RS-232 connectivity for legacy SCADA or MES integration
Sample Compatibility & Compliance
The ColorFlex EZ accommodates solid, semi-solid, and liquid samples—including coil-coated steel/aluminum sheets, powder coatings, polymer films, liquid inks, and granular pigments—via standardized sample holders and optional accessories (e.g., liquid cell kits, transmission adapters, and large-area sample stages). Its 31.8 mm aperture ensures representative averaging over typical coil coating defects (e.g., orange peel, mottle, or streaking). The instrument conforms to GLP-relevant operational traceability standards: all measurements include embedded timestamps, illuminant/observer metadata, and user-defined batch IDs. While not FDA 21 CFR Part 11–certified out-of-the-box, audit trails and electronic signature support are available when paired with HunterLab’s EasyMatch QC software (v5.0+), enabling alignment with ISO/IEC 17025 and ICH Q5E color stability protocols.
Software & Data Management
The instrument ships with embedded firmware supporting standalone data logging (up to 1,000 readings), statistical analysis (mean, std dev, min/max), and pass/fail tolerance mapping against master standards. For enterprise-level deployment, EasyMatch QC software provides comprehensive database management, SPC charting (X-bar/R, Cp/Cpk), multi-instrument calibration synchronization, and report generation compliant with ISO 9001 documentation requirements. Raw spectral data (31-point or full 256-channel) is exportable in CSV, XML, or HunterLab .hld format—enabling third-party integration with LIMS, SAP QM, or custom Python-based spectral modeling pipelines.
Applications
Primary use cases include incoming raw material verification (coil stock, pigment dispersions), in-process color consistency monitoring during continuous coil coating lines, final product release testing per AAMA 2603/2604/2605 specifications, and technical service support for color matching in architectural and appliance-grade coated metals. Additional validated applications span polymer extrusion QC (ASTM D313), pharmaceutical film coating (USP ), textile dye lot approval (AATCC Evaluation Procedure 1), and food packaging ink validation (ISO 2846-1).
FAQ
What is the recommended calibration frequency for routine QC use?
We recommend daily zero calibration and weekly white tile verification using NIST-traceable BCRA Series II tiles. Full recalibration is advised every 12 months or after 100,000 measurements.
Can the ColorFlex EZ measure translucent or backlit panels?
No—it is configured exclusively for reflectance mode. Transmission or transmittance-capable models (e.g., UltraScan VIS) are required for translucent substrates.
Is spectral data export supported in vendor-neutral formats?
Yes: CSV files contain wavelength (nm) and %R values at 10 nm intervals; full-resolution 256-channel spectra are available via EasyMatch QC export.
Does the instrument meet ASTM D2244 for color difference reporting?
Yes—its CIELAB implementation, illuminant selection, and observer angle options fully satisfy ASTM D2244–22 requirements for instrumental color difference computation.
How is inter-instrument agreement maintained across a multi-site facility?
HunterLab provides inter-instrument agreement (IIA) packages including master transfer standards, cross-calibration protocols, and delta-L* correction matrices—validated per ASTM E2539 and ISO 13655 Annex B.
