ASTM E2539

ASTM E2539 is the ASTM standard titled Standard Test Method for Multiangle Color Measurement of Interference Flake Pigmented Materials. It provides a technical framework for evaluating how these materials appear at different viewing angles, which is important when color shift and visual effect are part of the product definition. By addressing multiangle color measurement, the standard helps support more consistent testing, clearer comparisons, and better communication between suppliers, laboratories, and end users.

Purpose of ASTM E2539

The purpose of ASTM E2539 is to define a test method for measuring the color of interference flake pigmented materials at multiple angles. This is especially relevant for finishes that do not present a single, fixed color impression. The standard gives users a common way to assess angle-dependent appearance in a controlled and repeatable manner. In practice, it supports more objective evaluation of visually complex materials and helps reduce ambiguity in product specification, quality control, and color matching.

Common use cases of ASTM E2539

This standard is commonly used when interference flake pigmented materials must be evaluated for appearance across different viewing conditions. It is relevant for laboratories, manufacturers, and quality teams working with coatings, surface finishes, or other colored systems where multiangle color behavior matters. ASTM E2539 may also be used during product development, incoming inspection, or batch-to-batch comparison when consistent color measurement is needed to support technical decisions and documentation.

Why ASTM E2539 matters

ASTM E2539 matters because multiangle color effects can be difficult to judge by eye alone. A standard test method helps improve consistency in measurement and makes results easier to compare across projects, facilities, and suppliers. For procurement and compliance workflows, that consistency can reduce disputes and support clearer acceptance criteria. It also helps organizations evaluate performance more confidently when color appearance is a key product attribute rather than a simple single-angle value.

• Multiangle color measurement
• Interference flake pigmented materials
• Repeatable visual assessment
• Quality control and comparison
• Test method for appearance evaluation