How to add oil to the official seal is: 1, the method of infiltrating the seal and printing oil; Open the bottom cover of the seal, add ink to the text of the seal, turn the seal over, and seal it directly after the ink penetrates. 2. The method of adding ink to the ink return seal; Press the button, take out the stamp pad, add printing oil to the stamp pad, put the stamp pad back in its original position, and stamp it directly when the stamp pad is ready. 3, photosensitive seal printing oil method; Open the bottom cover, add ink to the lines of the text, wait for the ink to penetrate for 20 to 30 minutes, wipe off the remaining ink with a paper towel, and wipe off the printed surface before stamping.