B&E (Balentine Enterprises) ITRB2 Industrial Tint Reference Black – ASTM-Compliant Carbon Black Standard for Color Strength Calibration

Overview

The B&E ITRB2 Industrial Tint Reference Black is a certified, traceable reference material manufactured in the United States and fully compliant with ASTM standards for tinting strength evaluation of carbon black pigments. Unlike general-purpose carbon blacks, ITRB2 is engineered specifically for colorimetric calibration in industrial quality control laboratories—serving as a primary benchmark for assessing the relative tinting strength (TS), dispersion quality, and batch-to-batch consistency of pigment-grade carbon blacks used in inks, coatings, plastics, and masterbatches. Its metrological stability is validated through rigorous interlaboratory testing and certified homogeneity across multiple production lots. The material operates within the ASTM-defined ITRB series framework, which complements the broader SRB (Standard Reference Black) and IRB (Industry Reference Black) families—each serving distinct functional roles in rubber reinforcement, processing behavior, and optical performance characterization. ITRB2 is not intended for end-use compounding but exclusively for method validation, instrument calibration, and proficiency testing under ISO/IEC 17025-accredited environments.

Key Features

• ASTM-compliant reference material designated specifically for tinting strength assessment per ASTM D3265 and related colorimetric test protocols
• Traceable to NIST-traceable measurement procedures with documented uncertainty budgets for iodine adsorption number (IAN) and oil absorption number (OAN)
• Batch-certified uniformity: certified homogeneity verified via multi-point sampling and statistical analysis per ISO Guide 35
• Stable physical form: dry, free-flowing powder with controlled particle size distribution and surface oxidation state to minimize aging-related drift
• Supplied in hermetically sealed, light-protected aluminum-laminated pouches with inert gas purge to preserve surface chemistry integrity
• Accompanied by full Certificate of Analysis (CoA) including target values, ±3σ confidence intervals, and measurement methodology references

Sample Compatibility & Compliance

ITRB2 is compatible with standard dispersion protocols using high-shear mixers (e.g., SpeedMixer™ DAC 150), three-roll mills, or ultrasonic probe systems optimized for carbon black dispersion in polymer-compatible media such as polyethylene wax, linseed oil, or ethyl cellulose solutions. It meets ASTM D3265 requirements for tint strength reference materials and aligns with ISO 8770 (Carbon black — Determination of tinting strength) and ISO 385 (Laboratory glassware — Specification for volumetric flasks). For regulatory compliance, ITRB2 supports GLP and GMP-aligned workflows where documented traceability, audit-ready CoAs, and chain-of-custody records are required. While not subject to FDA 21 CFR Part 11 directly (as a reference standard, not a drug component), its use in pharmaceutical excipient colorant qualification falls within USP guidance on reference standards for analytical method verification.

Software & Data Management

ITRB2 does not require proprietary software; however, its certified parameter values integrate seamlessly into LIMS (Laboratory Information Management Systems) and ELN (Electronic Lab Notebook) platforms supporting ASTM-compliant data capture. Users may import CoA metadata—including target IAN (g/kg), OAN (10⁻⁵ m³/kg), and associated uncertainty ranges—into spectral analysis tools (e.g., Datacolor MATCHTEXT, X-Rite Color iMatch) for automated deviation reporting against test samples. Batch-specific identifiers enable version-controlled calibration history tracking, supporting ISO/IEC 17025 clause 7.7 (Assessment of measurement uncertainty) and internal audit readiness.

Applications

• Calibration of spectrophotometers and colorimeters used in carbon black tint strength testing per ASTM D3265
• Validation of dispersion protocols for high-pigment-loading formulations in automotive coatings and engineering plastics
• Interlaboratory comparison studies and proficiency testing programs administered by ASTM Committee D24 on Carbon Black
• Reference anchoring for quantitative structure–property relationship (QSPR) modeling of carbon black surface activity and optical density
• Supporting technical documentation for ISO 9001:2015 Clause 7.1.5 (Monitoring and measuring resources) compliance

FAQ

What distinguishes ITRB2 from SRB8 or IRB8?

ITRB2 is functionally specialized for tinting strength—not reinforcement or rheological behavior. SRB8 serves as a universal metrological anchor for physical property testing (e.g., DBPA, CTAB), while IRB8 evaluates rubber compound processability. ITRB2 targets optical performance only.

Is ITRB2 suitable for use in FDA-regulated colorant validation?

Yes—when deployed within a validated analytical method under USP or ICH Q5E principles, ITRB2 provides metrologically sound reference data for colorant lot release testing.

How is shelf life determined and verified?

Shelf life (24 months from date of manufacture) is established through accelerated aging studies per ASTM D572 and confirmed via periodic reanalysis of iodine number and colorimetric delta-E stability under controlled humidity and dark storage conditions.

Can ITRB2 be subdivided without compromising traceability?

Subdivision is permissible only under ISO/IEC 17025-accredited weighing conditions using Class A balances and certified weights; users must document mass uncertainty and retain original CoA linkage for audit purposes.

Does B&E provide technical support for method transfer?

Yes—B&E offers application notes, dispersion protocol recommendations, and ASTM method alignment guidance upon request, supporting seamless integration into existing QC workflows.