In order to measure paper surface strength, the IGT testing method is widely used in the paper making process and printing process. This tester is very convenient for printability management, because with this tester, the user can learn characteristics in advance, easily. The standardized tester in Japan is widely used because of simple and easy handling. It features capability of keeping constant printing pressure, ink thickness, packing and printing speeds, as well as of changing them as desired. In addition, measurement is enabled even with a small amount ink and paper.