Astm D823 !link! Jun 2026

The preparation of paint and coating samples in accordance with ASTM D823 is crucial for evaluating their performance and quality. The standard ensures that the samples are representative of the actual materials being used, which is essential for:

Uniformity is not just an aesthetic requirement; it is a technical necessity. When researchers evaluate a new varnish or anti-corrosive primer, the film's thickness directly influences: astm d823

While less precise than automated methods, Practice D provides a standardized way to apply films manually using a handheld blade or applicator. It is often used for quick checks or when specialized automated equipment is unavailable. Practice E: Spreadability Testing (Emerging Use Case) The preparation of paint and coating samples in

For products that are typically coated by dipping, Practice B uses a motor-driven device to withdraw a test panel from a container of liquid coating at a constant, controlled speed. The withdrawal rate is the primary factor determining the final film thickness. It is often used for quick checks or

Perhaps the most common laboratory method, Practice C involves using an automatic film applicator, such as those manufactured by TQC Sheen or Elcometer.

Standard Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels

ASTM D823 does not measure a property itself (like hardness or gloss); rather, it describes the . It sets the standard for how to apply a liquid coating (paint, ink, varnish) onto a substrate (like a metal or glass panel) to create a film with a highly uniform and specific thickness. This ensures that when other tests are performed (like scratch resistance or color matching), the results are comparable between different laboratories.