The TAPPI T 414 standard specifies a method for determining the Tear strength of paper using the Elmendorf method. This method applies a constant tearing force to the paper through an Elmendorf tearmeter, measuring the force required by the paper during the tearing process to evaluate the tearing performance of the paper. Tear strength is an important indicator of the ability of paper to resist tearing damage during use, especially for Encasement, writing and printing papers. This standard provides a standardized test method for the paper industry, which is widely used in paper quality control, product development and performance evaluation to help optimize the production process and ensure the durability and Reliability of paper in practical applications.