The TAPPI T 832 standard specifies a test method for the water-absorption energy of corrugated core paper, the floating-roll method. This method evaluates the water-absorption of corrugated core paper by floating the corrugated core paper sample on the water surface and measuring the time it takes for the sample to reach saturation. This method is suitable for corrugated core paper, and is especially suitable for quickly evaluating the water absorption rate and saturation degree of paper. The test results can be used to optimize the production process of corrugated fibreboard, improve its waterproof performance and gluing effect, and are of great significance for the quality control of Encasement materials