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D268-22 – Standard Test Method Technical Guide
ASTM D268-22 is a standard guide under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings. Originally approved in 1927, it was last revised in 2022, replacing the previous version D268-01 (2012). This guide provides essential procedures for sampling and testing volatile solvents and chemical intermediates used in paint, lacquer, varnish, and related coatings and materials.
🧪 Guide Overview and Scope
The scope of D268-22 includes procedures for sampling and testing volatile solvents in the manufacture of paint and related products. Test methods are listed in Table 1 of the standard. Values in SI units are regarded as standard, and users must consult Suppliers’ Material Safety Data Sheets (MSDS) for hazard information. The standard addresses safety, health, and environmental practices in line with regulatory limitations.
📊 Key Test Methods and Parameters
The standard references numerous ASTM test methods to evaluate solvent properties. Below is a summary of key test methods commonly used:
| 🟦 Test Method | 📏 Standard Designation | 🎯 Purpose |
|---|---|---|
| Flash Point | D56, D93, D1310 | Determines the lowest temperature at which vapors ignite |
| Distillation Range | D86, D850, D1078 | Measures the boiling range of solvents |
| Color | D156, D1209 | Assess visual clarity and purity using Saybolt or Platinum-Cobalt scale |
| Aniline Point | D611 | Indicates solvent aromatic content |
| Kauri-Butanol Value | D1133 | Measures solvent power |
| Specific Gravity | D891 | Determines density of liquid chemicals |
Each method is selected based on solvent type and application. For example, flash point testing is critical for safety during storage and handling, while distillation range confirms solvent composition.
⚠️ Safety Note: Always refer to the Suppliers’ Material Safety Data Sheet (MSDS) for detailed hazard information when handling volatile solvents. This aligns with Section 1.2 of the standard.
⚙️ Sampling and Safety Considerations
Proper sampling is essential to obtain representative test results. The standard emphasizes procedures that minimize contamination and degradation during sample collection. Users are responsible for establishing appropriate safety, health, and environmental practices per regulatory requirements, as stated in Section 1.4.
The standard has been approved for use by the U.S. Department of Defense and adheres to internationally recognized principles from the World Trade Organization TBT Committee.
💡 Tip: Ensure all testing equipment is calibrated per the specified ASTM methods to maintain accuracy and repeatability in results.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D268-22? This guide covers sampling and testing procedures for volatile solvents and chemical intermediates used in paint, lacquer, varnish, and related coatings. It references various ASTM test methods for quality assurance.
💡 Why are multiple test methods referenced? Different solvents require specific testing protocols. For example, flash point is tested using Tag Closed Cup (D56) or Pensky-Martens (D93) depending on the solvent type and properties.
⚡ How does this standard address safety? It directs users to Suppliers’ Material Safety Data Sheets for hazard information and emphasizes compliance with safety, health, and environmental regulations.
📌 Is this standard internationally recognized? Yes, it was developed in accordance with the World Trade Organization TBT Committee principles, ensuring global harmonization and acceptance.