Astm | D61821 Pdf
: Predict how a material will perform under specific "abnormal" conditions, such as extreme heat or high humidity.
To maintain the integrity of these procedures, ASTM D618-21 mandates strict control over the laboratory environment: : Defined as relative humidity.
Testing performance in extremely high-humidity environments. Key Technical Specifications
: Variations are strictly limited. For example, if a temperature tolerance of is required, the humidity tolerance must be within