ASTM D2805 is the standard test method for measuring the hiding power of paints by reflectometry. It provides a defined approach for evaluating how effectively a paint covers a surface, which is important for product comparison, formulation control, and quality assessment. By using a reflectometric measurement method, this ASTM standard helps create more consistent and repeatable results when checking paint hiding performance under controlled test conditions.

ASTM D2805 standard overview

The official title, Standard Test Method for Hiding Power of Paints by Reflectometry, indicates a test method focused on quantifying hiding power through reflected light measurements. In practical terms, ASTM D2805 supports a structured way to assess how a paint film obscures the underlying substrate. That makes it a useful technical document for laboratories, manufacturers, and buyers who need a common basis for evaluating paint coverage and comparing results across products or batches.

Where is ASTM D2805 used?

This standard is commonly used in paint testing and quality control settings where hiding performance must be measured in a consistent way. It is relevant to laboratories, coating developers, and inspection workflows that evaluate painted panels or related test specimens. ASTM D2805 may also support procurement and specification review when hiding power is an important performance criterion for a coating system. Its reflectometry-based method helps align test practice with repeatable technical measurement.

Practical importance of ASTM D2805

The practical value of ASTM D2805 is in helping users compare hiding performance using a recognized test method rather than informal visual judgment. That can support compliance efforts, reduce ambiguity in product evaluation, and improve consistency in quality control. For organizations selecting or verifying paint performance, the standard may help lower risk in specification disputes and support clearer communication between suppliers, labs, and end users. ASTM D2805 is therefore useful wherever measured hiding power matters.

• Reflectometric measurement of hiding power
• Paint coverage evaluation
• Quality control and product comparison
• Technical testing consistency
• Specification and procurement support