The TAPPI T 412 standard specifies a method for determining the Moisture content of pulp, paper and Cardboard, which is suitable for pulp, paper, Cardboard and paper products except those containing a large amount of non-aqueous volatile matter. This method uses the oven drying method to dry the sample to a constant weight at 103 ° C +/- 2 ° C to calculate the Moisture content as a percentage of the original weight of the sample. Moisture has an important impact on the performance of paper such as printability, dimensional Stability, physical strength, etc. Therefore, this standard is widely used in the paper industry for quality control, product acceptance and moisture detection in transportation Encasement.