本机用于测试塑料类、橡胶类、皮类、布类材料受热前与受热后变化特性。经规定温度及时间均匀受热后，观测试样老化前后之耐黄、开胶、收缩、伸长、残余率等性能，从而判定其老化特性。 This machine is used for testing the changes in characteristics of plastics, rubber, leather, abrics before and after heating. The specimen is checked to see its discoloration, split, shrinkage, extension, residual ratio, etc. so as to determine the aging haracteristics.