X-Rite eXact Densitometer

Overview

The X-Rite eXact Densitometer is a handheld spectrodensitometer engineered for precision density, colorimetric, and spectral measurement across the full spectrum of commercial printing, packaging, and ink manufacturing environments. Unlike conventional densitometers limited to status T, E, or I filters, the eXact employs a 31-channel silicon photodiode array with UV-LED illumination to capture full spectral reflectance data (360–740 nm) at 10 nm intervals. This enables simultaneous calculation of status-based density (ISO 5-4), spectral density, CIE L*a*b*, ΔE00, dot gain, trapping, and gray balance — all in a single measurement cycle. Its optical architecture complies with ISO 13655:2017 for M0, M1, M2, and M3 measurement modes, ensuring accurate evaluation of fluorescent whitening agents (FWA), optical brighteners, and pigment-coated substrates common in flexo, gravure, offset, and digital print workflows.

Key Features

• Four interchangeable apertures (1.5 mm, 2 mm, 4 mm, 6 mm) for precise sampling on fine halftones, spot colors, narrow bars, and textured packaging substrates
• Real-time Best Match guidance: algorithm-driven ink adjustment recommendations based on current density deviation from target, enabling proactive press-side correction before visible color drift occurs
• Configurable user interface: role-specific layouts for press operators, prepress technicians, and QC lab personnel — optimized via one-touch access to frequently used functions
• Integrated calibration tile with NIST-traceable reference values; automatic self-check and recalibration validation prior to each measurement session
• Bluetooth 4.0 and USB 2.0 connectivity for seamless synchronization with Color iQC Print, InkFormulation, and enterprise-level NetProfiler 3 color governance platforms
• On-device spectral data storage (up to 10,000 measurements) with timestamp, operator ID, job ID, and substrate metadata tagging

Sample Compatibility & Compliance

The eXact supports measurement on diverse substrates including coated/uncoated paper, cardboard, flexible films (PET, BOPP), metallic foils, and UV-cured digital prints. Its M1 mode ensures metrological consistency when evaluating papers containing optical brightening agents, while M2 (UV-cut) eliminates FWA interference for legacy standard comparisons. The instrument meets ISO 5-4:2020 for densitometric accuracy (±0.02 D), ISO 13655:2017 for spectral measurement repeatability (ΔE* < 0.15 under controlled conditions), and ASTM E308 for colorimetric computation. Data integrity is maintained through GLP/GMP-aligned audit trails in Color iQC Print — supporting FDA 21 CFR Part 11 compliance with electronic signatures, immutable logs, and user-access controls.

Software & Data Management

The eXact operates as a node within X-Rite’s integrated color management ecosystem. When paired with Color iQC Print, it delivers automated pass/fail reporting against job-specific tolerances, generates SPC charts for process capability analysis (Cp/Cpk), and exports CSV, XML, or XLSX for ERP/MES integration. InkFormulation leverages its spectral data to recommend CMYK or spot ink formulations matching Pantone Matching System® (PMS), PantoneLIVE™ cloud libraries, or proprietary brand standards. NetProfiler 3 aggregates eXact measurements across global sites to establish baseline color performance, detect inter-site variation, and drive corrective action plans — fulfilling enterprise-wide color consistency requirements.

Applications

• Pressroom real-time process control: monitoring solid ink density, dot gain, and trapping during live production runs
• Prepress verification: validating proof-to-press color fidelity and substrate-specific color shifts
• Ink formulation labs: correlating spectral reflectance with ink rheology and pigment dispersion metrics
• Quality assurance in packaging: measuring color consistency across laminated, metallized, or embossed surfaces
• Supplier certification: enforcing contractual color tolerances for co-packers and contract printers
• Regulatory documentation: generating auditable reports for ISO 9001, ISO 15339, and G7 Master Qualification programs

FAQ

Does the eXact support M1, M2, and M3 measurement modes?
Yes — the device automatically detects and applies the appropriate illumination geometry per ISO 13655:2017, including M1 (D50 with UV), M2 (UV-filtered), and M3 (polarized UV-filtered) for accurate evaluation of FWA-containing media.
Can spectral data be exported for third-party color science analysis?
Yes — full 31-point spectral reflectance data (360–740 nm @ 10 nm) is exportable in ASCII format for use in MATLAB, Python-based color models, or custom QA dashboards.
Is the eXact compatible with PantoneLIVE™ cloud workflows?
Yes — direct synchronization enables real-time comparison of measured values against dynamically updated PantoneLIVE™ digital standards, supporting brand owner-approved color approval protocols.
How does the Best Match function integrate with press automation systems?
Via Color iQC Print API, Best Match output can feed into ink key control systems (e.g., Heidelberg Prinect, Kodak PRINERGY) to auto-adjust ink zone settings based on density deviation trends.
What calibration traceability does the built-in calibration tile provide?
The tile is certified to NIST SRM 2021a and includes individual serial-numbered calibration certificates with uncertainty values per ISO/IEC 17025, valid for 12 months from issuance.