Evaluation of Reliability of Automatic System for Measuring Sizing Degree by Basis Weight Variation of Paper

Abstract

ABSTRACT Reliability of the novel automatic system capable of measuring both Stockigt sizing degree and contact angle at a time was evaluated through the calculation of its repeatability and reproducibility based on TAPPI Standard Method T 1200. As the basis weight of paper specimen increased, the repeatability and reproducibility of the automatic system became more improved than those from Hercules sizing test and contact angle test designated on TAPPI Standard Method T 530 and T 558. The more improved repeat-ability and reproducibility implies that a single tester can obtain the similar results under similar test con-ditions in spite of repetitive testing using the automatic system, and likewise that multiple testers can re-spectively reproduce similar data without big variation from the same paper specimen using the auto-matic system. In conclusion, this study is greatly m eaningful in having developed the world’s first auto-matic system to measure both Stockigt sizing degree and contact angle simultaneously with excellent repeatability and reproducibility.