emissivity.org Thermal radiative properties of materials
Standards, guides, and practical measurement intelligence.
Standards & Protocols

Standards and protocol layer

ISO and ASTM standards for emissivity and thermal radiation measurement, community protocols for blackbody traceability, sample preparation, and uncertainty budgeting.

ISO 20473ASTM E408ASTM E903ASTM C835Protocols
Good-Practice Guides

Directional → hemispherical conversion and more

Concrete, problem-centred guides bridging measurement geometry and engineering quantities. Community-authored and peer-reviewed through the network.

GeometryConversionZenodoGuide
Guides available soon →
Measurement Principles

Start here for newcomers

What emissivity is, which quantity matters, and how laboratory practice differs by temperature, angle, and material class. Written for advanced undergraduates and new researchers.

Intro pathEducationInterpretationNewcomers

Looking for textbooks, software, training courses, or reference links?

Our resources page collects databases, key textbooks, recurring courses (including IR-EMPOWER), software tools, and essential links for the thermal radiation community.

Resources & Tools →