The TAPPI T 544 standard specifies the aging test method for paper and Cardboard in heat and humidity environments. This method accelerates the aging process of paper and Cardboard by simulating high temperature and humidity conditions to evaluate their durability and performance changes. During the test, the sample is exposed to specific temperature and Humidity conditions for a period of time, and its physical performance (such as Strength, Color, Dimensional Stability, etc.) is detected. This standard provides the paper industry with a standardized accelerated aging method to help predict the performance of paper and Cardboard in long-term storage or use, and is widely used in quality control, product development and material performance evaluation.