One of the following agents should be used in removing such stains:

1. Lemon juice and sunlight. First wash the stains carefully, then moisten them with lemon juice and expose them to the sun for several days if necessary. This is satisfactory for stains on white washable materials.

2. Alcohol (wood or grain). Sponge the stains with alcohol, which removes the green part of the stain. Stains on wool or silk are practically removed by this treatment.

3. Potassium permanganate. First wash the stains with soap and water or sponge with alcohol.

4. Javelle water. First wash the stains with soap and water or sponge with alcohol.