TAPPI T 544 cm-08 provides a documented procedure for exposing paper and board specimens to humidified heat to assess long-term aging characteristics and compare material stability. The method covers apparatus requirements, specimen preparation, sampling, conditioning, moist-heat treatment, property testing, data analysis, statistical significance, and reporting. It is intended for technical laboratories, paper manufacturers, conservators, researchers, and quality professionals evaluating mechanical, optical, and chemical changes in paper products.
Application Scope: Accelerated moist-heat aging evaluation of paper and board, including comparative stability studies and assessment of changes in properties such as tensile strength, folding endurance, tearing resistance, brightness, opacity, yellowness, pH, and alkali solubility.
