HunterLab ColorQuest XE (CQXE) Spectrophotometer

Overview

The HunterLab ColorQuest XE (CQXE) is a high-precision, benchtop spectrophotometer engineered for rigorous color measurement and analysis across R&D, quality assurance, and production environments. Based on the fundamental principles of spectral reflectance and transmittance measurement using diffuse illumination and 8° viewing geometry (d/8°), the CQXE delivers traceable, repeatable color data compliant with CIE 15:2018, ASTM E308, ISO 11664, and USP . Its pulsed xenon lamp provides stable, full-spectrum illumination equivalent to CIE Standard Illuminant D65—without warm-up time or spectral drift—and eliminates the need for routine lamp replacement over typical instrument service life. The 400–700 nm spectral range captures the full visible spectrum at 10 nm resolution, enabling accurate computation of CIELAB (L*a*b*), CMC, ΔE00, and other industry-standard color difference metrics. Unlike true in-line process analyzers, the CQXE is designed for discrete sample interrogation under controlled conditions—making it suitable for batch verification, formulation development, and laboratory method validation—not continuous flow monitoring.

Key Features

• d/8° integrating sphere geometry with dual-beam optical path ensures high photometric stability and minimizes error from sample surface texture or directional reflectance
• High-efficiency, barium sulfate–coated integrating sphere interior maintains consistent diffuse reflectance characteristics over extended operational lifetime
• Automatic specular component included/excluded (SCI/SCE) mode selection enables independent evaluation of surface gloss effects on perceived color
• Large three-sided transmission compartment accommodates bottles, cuvettes, and flat transparent sheets up to 50 mm in height without repositioning
• Dedicated tactile measurement button and status LED indicators streamline operator workflow and reduce mode-selection errors
• Ergonomic sample holder supports rapid, reproducible positioning of solids (powders, plaques, fabrics) and liquids (in standard 10 mm or 50 mm pathlength cells)
• Robust mechanical architecture and solid-state electronics minimize calibration drift and field maintenance requirements

Sample Compatibility & Compliance

The CQXE measures color and appearance attributes of opaque, translucent, and transparent materials—including plastics, textiles, coatings, paper, glass, pharmaceutical solutions, and food-grade liquids. It supports calculation of APHA (platinum-cobalt scale), Hazen color, Gardner scale, Yellowness Index (ASTM E313), Whiteness Index (ISO 11475, CIE/ISO 105-J02), Haze (ASTM D1003), and Opacity (ISO 2814). All measurements comply with Good Manufacturing Practice (GMP) documentation standards and support 21 CFR Part 11–compliant audit trails when used with optional QualiCheck software. Instrument-to-instrument agreement meets HunterLab’s inter-instrument agreement specification (IIA ≤ 0.15 ΔE*ab for CR-10 tiles), ensuring consistency across multi-site QC labs.

Software & Data Management

The CQXE operates with Vision software (v5.x or later), providing intuitive method setup, real-time spectral visualization, statistical process control (SPC) charting, and automated pass/fail reporting. Raw spectral data (31-point or 10-nm interval) is exportable in CSV, XML, or ASTM E2915-compliant formats. Vision supports IQ/OQ/PQ protocol templates aligned with ISO/IEC 17025 and FDA guidance for analytical instrument qualification. Optional network integration enables centralized data archiving via SQL Server or cloud-based LIMS interfaces, with role-based user access control and electronic signature capability.

Applications

The CQXE serves as a primary color measurement platform in regulated and non-regulated industries: polymer compounders use it to validate masterbatch dispersion and batch-to-batch hue consistency; paint and ink manufacturers rely on its repeatability for spectral match prediction and metamerism assessment; pharmaceutical firms apply it for solution color testing per USP and visual inspection correlation studies; and packaging suppliers employ it for substrate whiteness verification and print contrast evaluation. Its versatility extends to academic research in material optics, pigment science, and sensory correlation modeling.

FAQ

Is the ColorQuest XE an online (in-line) instrument?
No—the CQXE is a benchtop spectrophotometer intended for discrete sample measurement. True online color analyzers (e.g., HunterLab’s MiniScan EZ or UltraScan VIS with flow cells) require integration into piping or conveyor systems.
Does the CQXE require annual lamp replacement?
No—the pulsed xenon lamp has a rated lifetime exceeding 1 million flashes and does not degrade spectrally like tungsten-halogen sources.
Can it measure APHA and Yellowness Index simultaneously with L*a*b*?
Yes—all indices are computed concurrently from the same spectral scan, with no additional measurement steps required.
Is instrument calibration traceable to NIST standards?
Yes—each unit ships with a NIST-traceable calibration certificate for reflectance (using certified ceramic tiles) and transmittance (using certified liquid standards).
What sample geometries are supported for transmission measurement?
Standard 10 mm and 50 mm pathlength cuvettes, flat glass plates, and cylindrical containers up to 50 mm in diameter can be accommodated in the open transmission chamber.