The purpose of the project is to find the quality of the printed on PET plastic and a PC plastic that is using the shape and hardness of pad rubber that different. The Trial start from the study data and the process of making a pad rubber and define shape and hardness of a pad rubber that is used in the trial. The pad rubber that is used in the trial will be split into 3 shapes and each shape can be divided into the 3 range of hardness. After that, printed on the PET plastic and PC plastic with plate to test the quality of the printing. A quality test includes the sharpness of the linear, letters, arc, dot screen and the flatness of the print solid. From the trial found that the pad rubber shape C has the appearance on top of rubber that high-pitched to be able to print it out good print quality most appropriate. The second is pad rubber, the shape B with the appearance on top of rubber that height and the round. And the third is pad rubber, the shape A that is the flat on top, the low print quality. The hardness of pad rubber , that the quality print on the PET plastic and PC plastic that most appropriate setting is the hardness of 10 – 14 Shore A. That is the print quality on the sharpness and bubbles at least. And this trial will help the pad printing on the PET plastic and PC plastic has the good quality and as a guide to select used pad rubber for T.A.O Bangkok Corporation Co., Ltd.