How to clean the ink stains on clothes?

Cleaning method of ink on clothes:

1, new ink stains or clothes that have not been soiled for a long time can be soaked in hot milk or yogurt, which is easier to remove.

2. Generally, ink stains on clothes can be made into mixed solution with 1 part oxalic acid and1part water, heated, dipped with cotton balls in the hot state and carefully scrubbed. As soon as the ink mark disappears, rinse it off with a little warm ammonia solution.

3. Ink spots on wool and cotton clothes can be removed with 10% citric acid solution.

4. Formulation of ink detergent