Ihara Electronic R750 Handheld Color Reflectance Densitometer
| Brand | Ihara Electronic |
|---|---|
| Origin | Japan |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Imported |
| Model | R750 |
| Pricing | Available Upon Request |
Overview
The Ihara Electronic R750 Handheld Color Reflectance Densitometer is a precision optical measurement instrument engineered for quantitative colorimetric and densitometric analysis of printed materials, packaging substrates, and coated surfaces. Operating on the principle of spectrophotometric reflectance measurement at standardized illuminants (CIE D50/D65) and observer angles (2°/10°), the R750 delivers traceable, repeatable density and color data compliant with ISO 5-4:2022 (Graphic technology — Measurement and evaluation of colour — Part 4: Spectrophotometric measurement of reflective samples) and ISO 13655:2017 (Graphic technology — Spectral measurement and colorimetric computation for graphic arts images). Designed for in-line and offline quality assurance in commercial printing, flexographic, gravure, and digital print production environments, the R750 supports real-time process control by quantifying solid ink density (SID), dot gain (TVI), print contrast, tone value increase, and chromatic attributes including CIE L*a*b*, ΔE₀₀, saturation (chroma), and lightness (L*).
Key Features
- Integrated rechargeable lithium-ion battery with continuous operation during AC charging via included 9 V / 500 mA adapter
- High-contrast graphical LCD display with intuitive menu-driven interface supporting dual-language operation (English and Japanese)
- Optical geometry: 0°/45° (annular illumination, 45° viewing) conforming to ISO 13655 and ASTM E308-22
- Pre-calibrated spectral response across visible range (400–700 nm) with 10 nm spectral resolution
- Automated measurement functions including trap compensation (ink trapping correction), hue error calculation, gray balance assessment, and tone curve generation
- On-device storage for up to 500 measurement records with timestamp and operator ID tagging
- Ergonomic handheld form factor with integrated aperture guard and stable contact measurement mode
Sample Compatibility & Compliance
The R750 is validated for use on matte, glossy, and semi-gloss paper, cardboard, filmic substrates, and UV-cured or water-based ink systems. It accommodates standard ISO test targets (e.g., ISO 12647-2 process control wedges, IT8.7/4 patches) and custom calibration plates supplied with each unit. All density measurements adhere to ISO 5-3:2022 (Densitometry — Part 3: Calibration of reflection densitometers) and are traceable to NIST-traceable reference standards. The device meets CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU and RoHS 2011/65/EU. For regulated environments, measurement audit trails and calibration logs support GLP and GMP documentation practices.
Software & Data Management
Measurement data export is supported via USB communication cable (optional accessory) to Windows-based desktop software (compatible with Windows 10/11, 64-bit). The companion application enables batch analysis, statistical process control (SPC) charting (X̄-R, Cp/Cpk), comparative reporting against master standards, and PDF report generation with embedded spectral curves and pass/fail flags. Software architecture complies with FDA 21 CFR Part 11 requirements for electronic records and signatures when configured with user authentication, audit trail logging, and electronic signature capture modules.
Applications
- Pressroom process control: real-time monitoring of ink density deviation and dot gain across CMYK and spot color inks
- Prepress verification: validation of plate output and RIP rendering accuracy against target tone value curves
- Quality assurance labs: routine inspection of finished prints against ISO 12647-2 tolerance bands (±0.05 D for SID, ±2% TVI)
- Contract proofing: objective comparison between digital proofs and press sheets using ΔE₀₀ and density delta metrics
- Supplier qualification: incoming material testing for substrate whiteness, gloss variation, and ink holdout consistency
- Color management system integration: input data for ICC profile creation and printer characterization workflows
FAQ
What standards does the R750 comply with for reflectance densitometry?
The R750 conforms to ISO 5-3:2022, ISO 5-4:2022, ISO 13655:2017, and ASTM E308-22 for spectral reflectance and density measurement protocols.
Can the R750 measure both density and color in a single acquisition?
Yes — each measurement captures full spectral reflectance data, enabling simultaneous calculation of Yule-Nielsen corrected density values and CIE L*a*b* coordinates.
Is calibration traceable to national metrology institutes?
Each unit ships with a factory calibration certificate referencing NIST-traceable ceramic calibration tiles; annual recalibration is recommended per ISO/IEC 17025 guidelines.
Does the device support custom spot color libraries?
Yes — user-defined spot color definitions (Pantone, DIC, TOYO) can be imported via software and referenced during field measurement.
What is the minimum measurable sample area?
The optical aperture measures 3.0 mm diameter; stable readings require a homogeneous surface area ≥6 mm in all directions.
