1. Wash the stain with clear water, so that the impact of water can wash the stain away as much as possible;
2. Knead Libai 3-in 1 washing powder and rice into a paste, precoat it on the surface of the stain, gently knead it repeatedly, and rinse off the cleaned stain;
3. Wash regularly with laundry detergent.
4. Soak the writing cloth with kerosene, and then rinse it with detergent.
Note: It is difficult to completely remove ink stains in calligraphy. Repeating the above operations can reduce stains.