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ASTM D618-21, titled "Standard Practice for Conditioning Plastics for Testing," provides the procedures for stabilizing plastic materials. Since polymers are sensitive to their environment, testing a "cold" sample versus a "warm" one can yield wildly different data. This standard eliminates those variables. Why Conditioning Matters
: Subjecting specimens to extreme temperature or humidity to simulate real-world service environments. Key Conditioning Procedures astm d618-21 pdf
Provides tables of accepted conditions, including: astm d618-21 pdf
Standard Practice for Conditioning Plastics for Testing - ASTM astm d618-21 pdf