Method 2: Use oxidant: hydrogen peroxide, hypochlorous acid, etc. Apply the seal gently, and then wipe it off with a paper towel.
Method 3: For paper that is not very thin, soak the sealed place with cold water and take it out within a few minutes. Then put it in the frozen layer of the refrigerator and take it out when the water is dry. Blow with a fan and soak in warm water. Also take it out in a few minutes and put it in the frozen layer. The soaked paper should be fine when it dries.
Method 4: Spray a little dissolved 1: 10 alcohol and water with a watering can, and then spread a layer of napkin on the top and bottom, which is very soft and has good water absorption. If it is naturally air-dried, it will absorb a lot (the napkin should be pressed tightly up and down at first, and it is best to press it with something), and then it can be completely removed.
Method 5: Scrape it gently with a knife, but it will damage the paper, and the effect of sticking it with tape is the same.