ASTM C693 is the ASTM standard titled Standard Test Method for Density of Glass by Buoyancy, and it provides a clear technical basis for measuring glass density using a buoyancy approach. This matters when accurate material characterization is needed for quality control, comparison of glass products, or verification of physical properties. By defining a consistent test method, the standard helps support reliable results and more uniform evaluation across laboratory and production settings.

What is ASTM C693?

ASTM C693 is a test method focused on determining the density of glass by buoyancy. As an ASTM standard, it serves as a technical reference for laboratories and organizations that need a consistent way to measure this property. The buoyancy method is generally used to evaluate how a glass specimen behaves when weighed in air and in a supporting fluid, allowing density to be determined in a controlled manner. ASTM C693 helps align testing practice with a recognized procedure.

Where is ASTM C693 used?

This standard is commonly used in glass testing environments where density measurements are part of routine material evaluation. It may support laboratory testing, product development, incoming material checks, and verification work tied to glass composition or performance characterization. ASTM C693 is also relevant in settings where repeatable measurements are important for comparing samples, documenting results, or supporting procurement and quality assurance decisions related to glass materials.

Why is ASTM C693 important?

ASTM C693 is important because density is a fundamental property that can influence how glass is evaluated, specified, and compared. A standardized test method helps reduce variation between users and supports more dependable results in compliance and quality control workflows. For manufacturers, laboratories, and buyers, that consistency can improve product assessment, reduce ambiguity in testing, and support more confident technical decisions when working with glass materials.

• Density of glass by buoyancy
• Standardized test method
• Laboratory and quality control use
• Repeatable material evaluation
• Technical reference for glass testing