Push the indentor to 75% of the initial thickness or 980N (The value which reached early is used. Moreover, it records to the test result which was used), at a constant rate 200mm/min(Fig.4), then remove the load at the same rate, and record the load-deflection curve as illustrated in Fig.6(where, retention time in transfer from pressurizing to the reaction of pressure shall not exceed 2s). Three kinds of hardness goods are measured respectively once.