HunterLab ColorFlex Desktop Colorimeter

Overview

The HunterLab ColorFlex Desktop Colorimeter is a precision spectrophotometric instrument engineered for objective, repeatable color measurement across diverse industrial materials. Operating on the principle of diffuse reflectance spectroscopy, it employs a pulsed xenon light source and dual optical geometries—45°/0° (for directional surface appearance assessment) and d/8° (for diffuse, sphere-based color evaluation)—to comply with CIE, ASTM D2244, ISO 11664, and USP Chapter <1061> requirements for colorimetric analysis. Designed specifically for high-throughput quality control environments, the ColorFlex delivers rapid (<1 second per measurement), non-contact spectral acquisition across the visible range (400–700 nm) with <3 nm wavelength resolution and <12 nm effective bandwidth. Its robust architecture supports long-term calibration stability and inter-instrument agreement ≤0.15 ΔE*_ab (CIE L*a*b*, average), making it suitable for multi-site manufacturing networks requiring traceable, auditable color data under GLP/GMP frameworks.

Key Features

• Two selectable optical configurations: 45°/0° geometry (31.8 mm port / 25.4 mm measurement area) for textured or glossy surfaces; d/8° integrating sphere geometry (14.3 mm port / 8.0 mm area) for uniform diffuse reflectance of powders, pastes, and irregular solids.
• Pulsed xenon lamp with >500,000 flashes lifetime—no warm-up time, no spectral drift, and consistent irradiance across full spectral range.
• High-resolution 6.4 × 6.4 cm LCD touchscreen interface supporting multilingual operation (English, Spanish, Chinese, French, German) without external PC dependency.
• Onboard QC software enabling pass/fail evaluation against up to 99 user-defined standards—including tolerance limits, Delta E metrics (ΔE*, ΔE_cmc, ΔE₉₄), whiteness (CIE, Ganz, ASTM E313), yellowness (ASTM E313, ASTM D1925), and opacity.
• Dedicated industry-specific modes: Tomato Color Mode (a/b ratio, juice/sauce/puree grading per USDA guidelines); Citrus Color Mode (Citrus Number, redness/yellowness indices aligned with FDA juice standards).
• Compliance-ready data structure with timestamped measurements, operator ID logging, and audit trail capability compatible with 21 CFR Part 11–configured systems when integrated via optional Ethernet or USB export.

Sample Compatibility & Compliance

The ColorFlex accommodates opaque, translucent, and semi-transparent samples—including granular solids (resins, pellets), viscous liquids (ketchup, sauces), powdered pigments, molded plastics, and cast films—without requiring sample preparation or dilution. Its upward-facing aperture eliminates spill risk and enables direct placement of containers (e.g., Petri dishes, cuvettes, trays). All measurement protocols adhere to ISO 7724-1 (colorimetry fundamentals), ISO 7724-2 (instrumental requirements), and ASTM D6290 (color measurement of food products). Instrument inter-comparability is validated per ASTM D6867 and certified in HunterLab’s factory calibration report, which includes NIST-traceable reference tile verification at multiple wavelengths.

Software & Data Management

Controlled via Windows®-based EasyMatch QC software (included), the system supports advanced spectral data handling: batch reporting, statistical process control (SPC) charting (X-bar/R, Cp/Cpk), spectral difference overlays, and custom index derivation. Raw spectral data (10 nm intervals) and calculated color values are exportable in CSV, XML, or PDF formats. Optional cloud synchronization and API integration enable real-time dashboarding in enterprise MES or LIMS platforms. Software validation documentation—including IQ/OQ protocols and electronic signature support—is available for regulated industries subject to FDA, EU Annex 11, or ISO 13485 requirements.

Applications

• Food & Beverage: Quantitative grading of tomato paste, citrus concentrates, dairy powders, and confectionery coatings per USDA, Codex Alimentarius, and private label specifications.
• Plastics & Polymers: In-line color consistency monitoring of injection-molded parts, extruded profiles, and masterbatch formulations across production shifts.
• Paints & Coatings: Batch-to-batch verification of architectural paints, automotive refinishes, and industrial coatings using CIELAB tolerancing and metamerism index calculation.
• Pharmaceuticals: Excipient color qualification, tablet coating uniformity assessment, and stability testing per ICH Q5C and USP Chapter <1061>.
• Cosmetics: Pigment dispersion analysis in foundations, lipsticks, and nail polishes; compliance with ISO 22716 (GMP for cosmetics).

FAQ

What optical geometries does the ColorFlex support?
It offers both 45°/0° (for surface appearance-sensitive applications) and d/8° (for diffuse reflectance of heterogeneous or textured samples), selectable via hardware switch.
Is the instrument compliant with FDA 21 CFR Part 11?
While the standalone device does not enforce electronic signatures, its EasyMatch QC software supports Part 11–compliant configurations—including audit trails, role-based access, and electronic signature workflows—when deployed on validated IT infrastructure.
Can it measure liquid samples directly?
Yes—using optional liquid cells or standard Petri dishes placed directly over the upward-facing port; no cuvette holder required.
How is inter-instrument agreement ensured?
Each unit undergoes factory calibration against NIST-traceable ceramic tiles and ships with a Certificate of Conformance specifying inter-unit ΔE*_ab ≤0.15 (average across 12 standard tiles).
Does it support custom color indices beyond standard CIE spaces?
Yes—users may define proprietary indices (e.g., product-specific yellowness formulas or hue-angle thresholds) via EasyMatch QC’s formula editor and apply them to all measurements.