If it is calligraphy ink, you can try the following methods:
1. Wash the stain with clear water, so that the impact of water can wash the stain away as much as possible;
2. Knead the laundry detergent and rice into a paste, pre-coat it on the surface of the stain, and gently rub it repeatedly to rinse the washed stain;
3. Wash regularly with laundry detergent.
Note: It is difficult to completely remove ink stains in calligraphy. Repeating the above operations can reduce stains.
If it is pen ink, you can try the following methods:
1. Rinse the stain with clean water to dilute the stain as much as possible;
2. Apply the stock solution of laundry detergent to the stain, completely cover the stain, let it stand for 5 minutes (gently scrub), and add laundry detergent for routine washing;
3. If the above methods can't remove the stains, put the clothes into the basin, stick the stains on the bottom of the basin, measure out the 1/4 bottle caps (10g) and 1/4 bottle caps (10g) with blue moonlight clothes, and pour them on the blue moon collar.